FWIW, my dad (81) used the same Lian-Li ATX mini-tower case for several custom desktop computer builds with various Microsoft Windows, Vista, 8.0, 8.1, and 10 Professional editions.
However, he decided to ditch that case in favor of a Lian-Li ATX SFF midi-tower case with tempered glass on the front and left side for his newest Windows 11 Professional computer.
Nonetheless, I concur with you and all the other members that you should continue to use your old case, but I prefer to switch to a new ATX case for all my desktop-only computer builds.
So far, with my three custom desktop-only ATX midi-tower computer builds, which I have used for ten years each, it makes sense to switch to a new case because it is rather convenient.
Nevertheless, I plan to buy a new pre-built ATX midi-tower computer build with Windows 11 Professional by October 14, 2025, but in the meantime, I will only need to decide on the best brand.
Good luck!
Microsoft Windows 10 Professional 64-bit V. 22H2 (19045) Retail Desktop PC, EAMH Paid/EEK, MB 5 Prem., and Unchecky, MDFW, FF with uBO/AG, Grammarly Free, MBBG, and Acronis True Image Essentials, RuckZuck, PatchMyPC, UpdateHub, UniGetUI, UCheck, and Winget. I have 29.5 Years of PC Experience.