In 30 years we'll have plenty of computers from 2020 that are still used. Survivor bias is strong, we just don't see all the computers from the 90s that already gave up the ghost
The computer is still going to work, no problem. Floppies on the other hand are bit riskier bet.
They still do. The problem is the software.
sorta. The smaller lithography processes for semiconductors actually do degrade faster. More static risk too. XT computers were practically electromechanical.