Beyond online services (niche and otherwise) there's no practical way to use it day to day.

Regardless, I would (and plan on) use it as a way to mostly keep your savings yours and keep a fiat account open only for essentials (food, bills, etc.) while having the majority of your money in a cold wallet.

That's before factoring in Lightning for the few online retailers that accept Bitcoin natively and don't use it to swap for goods and services traditionally obtained through fiat (ala Cake Wallet).