I don't know much about filesystems, but I have heard it said (including at least one comment in this thread) that only NTFS enables the live indexing of Everything, and that there is not an equal tool on Mac because of this. Can anybody corroborate or give details about why? APFS is a very recent filesystem, and it was designed by Apple - so if this capability really is absent, presumably that's on purpose, as a tradeoff for something.
The tradeoff is that file systems like NTFS or HFS+ (and other journaled file systems), can take up more space and incur write penalties (To file itself, to the log, metadata etc...). APFS is as you point out a newer more modern file system, that has efficient resource sharing (like copy on write) and snapshot support.
You can have a fast indexed based search on APFS, but you'll pay for it with a very large index size, which the average user doesn't want.
