The 388 was the only 1/4"-8-track all-in-one'r,... Portastudio-format recorder, ever.
So, it's kinda hard to compare the 388 to anything else. All other Tascam reel 8-tracks were 1/2"-15-ips machines. There's no comparison between the two, with 1/2"-15-ips delivering more raw, stark fidelity, by far.
In it's own right, the 388, with it's 1/4"-8-tracks @ 7.5 ips & dbx, delivers a very nice hifi sound, plus the mixer section itself is worth the price of admission.
The only other 1/4" 8-tracks were Fostex units (A8, Model 80, R8, E8), and they ran 15 ips & Dolby C. I dunno if the Fostex sound is superior to the Tascam 388, but it surely is different. It depends on who you ask. Some people are die hard Fostex fans, but I'm not, so take that for what it's worth. On the other hand, I do own the Fostex units and the 388, and that's what I base my opinions on,... not just some pie-in-the-sky estimation on what I "think" they sound like. I've always favored the 388. Honestly, despite the 7.5 ips speed (vs 15 ips), with dbx the 388 delivers a nice warm hifi sound. I never liked any Dolby C machine as much as a dbx machine, and that's partly why I'm such a huge Tascam fan.
You're right, that all this new tech causes people to give up their older equipment silly-cheap, or sometimes even free, and you can't help but to love that.
That's my biased opinion. Now it's time for some other heads to hop on this board and tell me I suck, and I dunno what I'm talkin' about.
C'ya, and congratulations!