I truly admire your patience. I ditched my PowerLogix upgraded 8600 in 2003 after I got my tangerine iMac G3 400 MHz.
These days, I'm completely spoiled with my 4.5 GHz 4690k on SSD with Arch Linux.
The funny thing is: this overclocked monster gaming PC is the first machine I've had that boots as fast as a IIcx or SE/30 with System 6.0.8.
TC is a bit boggy in Classilla but then I don't have huge expectations of nearly 20 year old hardware heheh. For what it's worth, to a point you can still find a way around most things on old hardware other than some specific tasks that require specific pieces of software that just arent supported due to inadequate hardware or deliberate deprecation... ie. Skype. For most general tasks though, older hardware is fine if you are comfortable with the slower pace and aware of the security risks and tailor your use accordingly.