I agree on many points. The PPC 601 upgrade is not good to put into most Quadras.
24/32 bit addressing becomes an issue for some older software that can only run on pre System 7.5 machines. I've only run into a few things that are not important to run on a "high powered machine" like some games. In fact, some games are awful to play on a "high powered machine" because they run too fast and become unplayable.
If you are getting a "high powered Mac" like a Q475 to Q950, get a "low powered Mac" like an LC III if you do not have one to keep certain software going that wont run the Quadras. For me that would be Comic Works, a great little program to daw comics with but it wont work on anything on System 7.5 and/or PowerPC.
24/32 bit addressing becomes an issue for some older software that can only run on pre System 7.5 machines. I've only run into a few things that are not important to run on a "high powered machine" like some games. In fact, some games are awful to play on a "high powered machine" because they run too fast and become unplayable.
If you are getting a "high powered Mac" like a Q475 to Q950, get a "low powered Mac" like an LC III if you do not have one to keep certain software going that wont run the Quadras. For me that would be Comic Works, a great little program to daw comics with but it wont work on anything on System 7.5 and/or PowerPC.