Before I fled, I worked as a 'DBA' for a Big Aerospace company and was forced to use Access for everything - the spods in IT were outsourced morons who wouldn't allow anyone to actually do anything with IT beyond what was on the desktop. So we had Access and we made it jump through all sorts of hoops. When my boss and I quit there were hundreds of them! All with hundreds of users, and because it was so rubbish at multi user, it was split up and so only a dozen users were in any instance, which another Access db later pulled in and merged, and so on.
The 'backups' were insane. They were done by another series of Access databases, so when some muppet deleted all their weeks reporting "by accident' we could still get it.
There was a Access db front end menu that looked up which version of which database that user was to be presented with when they clicked 'the' button - which was actually changed depending on where, when and who did the clicking...
This was all backed up on a 'secret' HDD that was swapped in and it of the bosses laptop, as he couldn't get permission to store so much data anywhere. (It was also on the network, but since it was a database, IT couldn't cope with backing it up! They'd back up the initial file, but anything that changed they didn't notice. And this was a major IT company! )
So anyway, when my boss quit, I wasn't long behind him. And I became a locksmith. (Still a very technical job, but far fewer computers!)
I still sometimes wonder how the muppets got on. They were the kind of users baffled by the scroll bar moving the page down...