I have a T470 bought in 2017. I have done the following:

- replaced the screen when I accidentally dropped water on the laptop, and the screen shorted out.

- upgraded RAM from 8 GB to 32 GB

- Replaced internal battery after it gave out about 5 years in.

- Expanded storage by putting a memory chip on the WAN slot.

I think almost all of these issues would have required getting a new laptop if it was not repairable. I also have done similar repairs on my T440s, so it will work as an emergency laptop if anything happens to my T470. In fact, it did when I my screen stopped working 3rd month of Covid.