Metamask is the wallet with the lowest barrier to entry for new folks entering the crypto space. Going from no knowledge to having a wallet is much quicker with metamask than hardware wallet.
Its also great for devs deploying contracts on test networks.
I'm one of them, used years ago to test some development on the Blockchain and now I use it mainly as wallet for some small holdings that I've in few tokens
I use it to hold a fair amount of my crypto holdings. I personally don't spend crypto particularly often but I have a friend who uses crypto whenever he can, if you go a bit out of your way you can do a lot of your purchases that way. The metamask UX is nice and pancakeswap integration is useful too. Wish it supported Solana.
I would love to hear what people do with it.