I think if you search this site you will find a very worthwhile thread regarding long term maintenance needs for V70s. I posted a question on this topic a year or two ago and eventually (IIRC) was able to assemble the most complete list of "watch" items I've seen to date. I don't own a V70 but I think I'd like to, but the increased complexity, combined with the fact that I don't work on my own cars but pay others to do so, has had me wondering what to expect.

You may feel that the responses you've received answer your original question, my comment is intended more to help you know what else you might expect over the long term.
--
'85 240 DL with 37K miles, '94 940 with 191K, 40 linear feet of vintage jazz, r'&'b, funk and soul

I have the same model with 154k now. You will need to replace those struts, the spring seats (the two rubber points into which the top of the springs sit ) and the pivot or bearing plates, the steel plate whose three bolts protrude through the top of the strut towers that you see when you open the hood. You can do the job yourself. You just have to borrow some spring compressors from Auto Zone or the like and contain the power of the springs. Lift the hood and look closely at the strut towers and see if the plastic dust shield around the bearings are coming off or if oil is leaking out of the bearings, the circles about 2 inches in diameter in the strut towers. At my 154 k moment, I may soon have to replace the flame trap under the intake manifold as it may soon clog and cause pressure in. Mine still runs very nicely and starts every time. These cars are capable of long lives but go through death cycles when several items suddenly come due like brakes , rotors , rear shocks, timing belt , drive belt and so in. Your timing belt should be changed today. If it breaks , pistons will smash into valves and the cylinder head wil have to be rebuilt and the valves are around $65 each and there's 20 of them ? The water pump is in back of the belt so you might as well change it, especailly if there is limescale on it indicating the beginning of the end for it anyway

As another Vermonter with a 98 V70 (one base w/200K, one AWD w/170K), I can say that I was also told a rear strut was starting to leak a couple years ago, and I haven't bothered to fix it. The car seems OK, and the ride has not deteriorated.

I have gotten to the point where, with a 16 year old car, if I have to spend a bit on maintenance, and it adds up to less than what I would pay on monthly payments and repairs for a new car, I'll pay it. I like the cars; they are comfortable and safe and still run well, for the most part.

In Chittenden County, there are several mechanics. and I have had recent experience with one who says work was needed that I questioned, went to another mechanic, and found that the problem was easier to fix. Who is your mechanic> I could offer recommendations and experiences if you'd like.

At 125K it is time for new struts/shocks. "beginning to leak"? Either they leak and are dead, or they are not leaking. A mechanic will charge at least $1,000 for new struts/shocks, it is part of their bread and butter. An easy job for them because most people shy away from compressing the strut springs and adding 60 degrees of torque to the bolts.

New parking brake shoes are cheap, removing the rear rotor and putting the large spring back in place is not fun. I normally replace the rotor when putting on new shoes.

The leaking cooler line is an easy fix. Buy a new clamp and O ring and replace them. If you haven't done so, it is also a good time to flush the ATF.

All of your concerns relate to normal maintenance. Do them to make your car last for another 125K miles.

--
My back feels better when I sit in a Volvo seat

That becomes a personal issue, cost of maintaining the car vs a newer car. I wrench the family fleet of 850s, just went from 3 down to 2 and did all those jobs you mention on our fleet. Being in VT your car gets bounced around on the roads.

Me I stick with fixing the problems up to a point. Complete Engine failure or Trans failure would be the straw that would make me go to a newer Volvo.