Yes, 100-120k is when they start to become a bit ratty IME. What's interesting is that sometimes the most minor of repairs can fix the rattiness. I remember a Peugeot 406 that I was flogging up and down the country, the front ARB bushes wore out and the suspension was clattering away at a similar mileage to yours. I don't imagine that it did anything to improve the handling either. It definitely felt that the car was coming to the end of its life. I was having dark thoughts about getting rid, but eventually got round to getting it fixed. Transformation! It was fine, and did another year in my service before being stolen. Conversely there are cars that just need to die. I had an old Vectra, after 110-120 k miles it was a rat. Leaky wheels needed the tyres inflating every week, burning oil at a litre a month or so, PAS fluid leak required regular topping up and was too expensive to repair, then it handed me a clutch 300 miles from home. I should have binned it there and then and gone home on a transporter, but I needed it to get home via an important social call that weekend. Had a clutch fitted, got home, 6 months later it was leaking clutch fluid again, short MoT, so I flogged it spares or repairs. The Vectra was a POS compared to the Cav. In the 90s every taxi in Leeds was a Cav, they were indestructible and like mine they went on for ever. The Vectra was utterly crap in comparison. Less performance, worse economy, and less durable. GM cost cutting again, nobody wants their cars to last for 200k miles.
You might find that your current car is worth getting fixed if it's just minor faults making it unpleasant. I recently spent £500 on paintwork to bring mine up to snuff, it's not economically worthwhile but it transforms it from "old banger" to nice looking older car. Likewise it needs new door seals, they are noisy at speed. It's not a "necessary" repair but again it makes it a nicer place to be. Modern cars are comfortable, you aren't rattling around in some noisy, draughty Land Rover so it shouldn't feel like one. I run older cars, as you can see from my history above and the number I have killed off or at least taken up to retirement age. It's very easy to run them into the ground and only repair the things the MoT or basic servicing demands, but you then end up in a car that works but that isn't a nice place to be. If you can live with that, if the thing is a local workhorse, that's fine, but if you do 20k miles a year in the thing you want it to be a nice car to be in.
