Using legacy private keys (WIF) without legacy wallets in the future

I'm sorry if I ask a noob question but i've tried to wrap my head around this for the last hour.

Suppose you have a legacy private key (WIF uncompressed) for cold storage. (Please don't tell me the benefits of hardware wallets)

As I wanted to import another private key of the same type for testing purposes into bitcoin core, i learned that this wasn't as easy as I thought. I need some kind of very complicated tranformation using descriptors. (I still didnt manage to do this)

My question is: Will it be possible to use legacy private keys (WIF uncompressed) in 10 or 20 years? There will be no support for legacy wallets in a few month. Satoshis keys must be legacy too, right?

I can understand that there are benefits to newer address types but I just want to use my "old" legacy address. Why is this so hard?? ????