I recall dual booting BeOS circa 1999/2000, on my 486dx2-66.
It was shockingly performant, especially with anything graphical.
The difficulty was no apps.
Brings back fond memories, nonetheless.
It had a decent number of apps, I drove it as my primary OS for a while.
Ended up using Linux, but it was a great OS for its time.
It was ridiculously fast on my family’s Dimension 4100 tower, which had a 750Mhz PIII in it. The 98SE install that machine shipped with was glacial in comparison, and though Win2K shrunken the gap dramatically it still wasn’t as fast as BeOS.
I was able to find a decent number of apps on BeBits but a lot of stuff was missing.