Ssds don’t hold data for 10 years so there’s a strong possibility that in fact it would not “boot up just fine”.

If there’s critical keys that have been lost etc it might indeed be unrecoverable, especially in this era of automatic bitlocker.

It has spinning rust. Additionally it's true that SSDs have trouble retaining data for long periods of time, but afaik this is separate to actual degradation. So if it had an SSD it might not boot off it, but the hardware is otherwise fully usable. Same situation if you lose an encryption key.