Long time ago I worked at a hospital and once had to go to a certain department to fix something on computer nurses were using and was horrified how slow the computer and everything was. So I asked around and ladies happily explained their daily morning routine: - turn on computer - do a morning checkup of all patients (around 20 minutes) - when they got back, computer usually finished starting Windows, if not, they waited another 10+ minutes for it to get ready - then they started Word (another 10 minutes) - and opened their main document with notes..or to be exact wanted to open the document. That took another 10 minutes

TL;DR - users can get used to pretty much anything because they don't know it could be so much better