Re: Doing Something Stupid...
Three decades? for most of the time they've had no competition. Or at least none which stood any chance of stealing their business.
Office suites to rival MS Office appeared and were nice but didn't open Office docs correctly or had some glaring omission (such as a toy Database like Access).
OSes appeared too, but they didn't run Windows apps at all or not very well.
Only mobile and the shift away from the desktop has rattled Microsoft.