If you can't find new inspiring music you're not trying very hard. There was never a "golden age" for popular music, there's just old people who stopped looking for new music. Every era has a handful of truly great artists (or truly popular artists) and then a gajillion copy cats. There were SOOOOOO many Beatles/Stones/Zep/EVH/Motley Crue/Nirvana etc etc knockoffs when they were popular and breaking. Modern production ability has just lowered to the cost of entry, which IMO is never a bad thing. If anything it's lead me to MORE new inspiring bands because getting something to sound halfway decent isn't an expensive and time-consuming thing, so artists have to try to do something different or better to clear the noise. There's nothing wrong with really loving a particular era for the production and sound, but most of that is probably more like rosy red glasses from when YOU first heard it, not an objective value based on those things. Literally everything in heavy music these days is "better"...guitar tones are better, drum sounds are better, vocalists actually have technique and can do more with their voices, the access to information/lessons has led to a massive amount of highly-skilled players. The thing with the production is if these tools were available to people in the 80s and 90s, I guarantee they would have been using them all, all of the time. The differences in production from them wasn't because they weren't all going for the heaviest, clearest, best production or trying to match certain studios/artists sounds, its that it was a lot more complicated to do.