Maybe it's like a Bloomberg terminal as of a few decades ago?

I think access to market data is a challenge in trying to replicate more of the present-day Bloomberg terminal. First because it's so voluminous (as people elsewhere in this thread have said), and second because so much of it is commonly provided under license for a fee (and with nondisclosure obligations) (and also subject to the trend where people pay more to get or generate market data that's closer to real-time).

But in terms of the feature competition, I think people have upvoted this so much because it's an initial version of a single person's passion project that manages to put a whole bunch of financial information at your fingertips. With an active community (and modulo the important data access issues), it could easily grow and grow and grow in functionality.

a couple of decades ago the bloomberg was massively more than that already

Brittanica also had much more than Wikipedia. And Unix could do much more than Linux.

This is how great open source begins.

Also, this looks like it's purely for equities - no bonds, futures, options, swaps, etc. I suspect that by volume of risk traded by users (not purely through the terminal), equities are a minority of what the Bloomberg terminal supports.

Still, this is a cool hack. I understand that it is not a genuine attempt to unseat Bloomberg!

I know, I got excited when I saw the headline, only to discover it’s yet another equity-only tool