Yes, it is ostensibly a tool from the 70's but it is also the most complete, correct, and featureful typesetting engine that exists.
TeX's downfall is the macro system. It makes it too easy for people to pile on poorly written abstractions that make working with any given document a nightmare because it has its own DSL. But because those packages and macros grew organically by researchers solving problems for themselves they are too practically useful to just drop them. So there are lots of annoying unintuitive quirks that you end up just having to put up with.
Of course it's a work of love, but it's a tool from the 70s
Clinging to the past might be interesting but in the end it's that, a tool