Geordi does let Scotty know that not everything has gone through huge changes:
So I think I have to revise my thoughts. Yes, Scotty was in the way and should have taken Crusher's advice and rested. But he could have been useful in studying the data the Enterprise was collecting. But then he and LaForge wouldn't have been able to save Enterprise.Scotty: Bunch of old useless garbage.
La Forge: Huh?
Scotty: I said it old Mr. LaForge it can't handle the interface ("inter phase" maybe?) of your power converter. This equipment was designed for a different era. Now it's just a piece of junk.
LaForge: I dunno, it seems like some of its held together pretty well.
Scotty: A century out of date. It's just...obsolete.
LaForge: Well, you know, that interesting because I was just thinking that a lot of these systems haven't changed much in the last...75 years. This transporter is basically the same system we use on the Enterprise. Subspace radio and sensors still operate under the same basic principle. Impulse engine design hasn't changed much in the last 200 hundred years. If it weren't for all the structural damage, this ship might still be in service today.
Scotty: Maybe so, but when they can build ships like your Enterprise, who'd want to pilot an old bucket like this?
LaForge: I don't know, if this ship were operational, I bet she'd run circles around the Enterprise at impulse speeds. Just because somethings old, doesn't mean you throw it away.
Just an example, a friend of mine has been working on electronics, TV repair and the like since he was in his teens back in the 1980's, currently he repairs and tunes high end pipe/digital/combination organs. He's worked on old TV's that still used tubes, and has a TV that was made in 1980, 25" screen in his bedroom that he's kept in working order. Recently a mutual friends plasma HDTV broke down. The error code it gave said a board had failed and needed replacing. Checking around our friend got a cost to fix it. It cost ~$500 just for the board. My friend, after buying the schematics took the TV apart checked the board replaced a a capacitor and re-solder a few connections, put the TV back together, and the TV's working fine. He'd never worked on an plasma HDTV before, or any HDTV for that matter. The cost including buying the schematic $50.00.
But he was around for those changes and was aware of them.
Actually, CGI had been planned for TNG, but was stupidly not carried out, even though Babylon 5 would use CGI a few years later (and with a lesser budget than TNG.)
And Bab 5's CGI looked like complete shit.