Searching for almost anything was so much easy. Such a powerful tool that disappeared. Its performance 20 years ago was better than Finder is today. At least from my experience.
I'm sure there are similar tools on Linux.
When I install KDE Plasma, I always disable baloo indexer because I don't need it, but I think it does something like Everything.
If you're running your Linux install from an ssd, you could probably just leave it enabled. Ssd's are really, really fast at reads and indexing, vs mechanical hard drives, it doesn't really add much overhead to an ssd.
Its performance 20 years ago was better than Finder is today
This is the case for a lot of software, and it drives me crazy. We used to have slow, relatively unreliable hard drives, single core processors, and significantly slower RAM, and yet some things feel slower today than they did 20 years ago. Try Windows 98 on an old PC (or a VM with a single throttled core) and compare it to any modern Windows OS. Try Visual Basic 6 and compare the startup and build speeds to any modern IDE.
It feels like some software has been getting slower more quickly than hardware has been getting faster...