Been in the market looking for a good replacement to my old thinkpad, but I don't know if people have noticed, most laptops today cannot be upgraded for RAM an

Been in the market looking for a good replacement to my old thinkpad, but I don't know if people have noticed, most laptops today cannot be upgraded for RAM and in some cases even the HDD/SSD and batteries are soldered on to the board. Add to it, keyboards seem to come down a few notches in terms of quality. So, earlier my laptops have typically been with me for nearly 6 years each, these days, with the constant upgrades it feels like Iam buying a mobile phone that is sealed shut and demands an upgrade every 2 years. I've now stopped updating OSes as a result of the slowdowns I see everytime I upgrade the OS.