Instead, CGI became a lazy way out for quick and sloppy production quality, even in established franchises from studios with deep pockets. In the first IronMan and SpiderMan movies, the heroes actually wore physical suits painstakingly made by artisans in the business. In the last Marvel movies the costumes are just lazy CGI that look like textures over a spandex suit instead of acting like physical items over a human body. Terminator 1 & 2 had practical models and they still look great.
"Oh, we don't need to finalize the real costumes and models now, just dress the actors in gray spandex with tringles, put them behind a green screen and we'll CGI everything later on before release". "It's OK, we don't need to bother having correct lighting and shadows in the studio, the CGI monkeys will just fix it in post with their computer thingies."
CGI now somehow looks worse than VFX 10-30 years ago despite the insanely better tech, everything just feels rushed with no creative direction behind it.