With all the web surfing,cloud and streaming going on, most PC are just glorified Terminals anyway.
Terminals 'went away' when the data they needed couldn't be run over existing copper phone lines at 110 or the brand new full duplex 300 baud that the prices dropped to merely being 'expensive' in 1970s as the microcomputer using the new low cost, high performance 6502, 8080, 6800 or Z-80 CPUs.
I did my first 'Timeshares' with an PDP-8 Minicomputer via a 110 baud ASR-33 Teletype with the modem using acoustic cups to fit a Ma Bell Handset, despite the Carterfone decision that non AT&T devices can be hooked to the phone network being just a few years in the past, this being 1974 at the time.
300 baud modems were expensive, as was all computer gear back then.
I'm not a great touch typist, but I could type faster than 300 baud could update.
So 110 baud was very sedate, as far as transmission speed.
Everyone had the need for speed, be it aircraft cars or computers.
So that meant local, personal computers to run your programs