tldr: If you have good internet and you live within 500 miles of somebody (and ISPs are feeling benevolent that day) you can play music together over the internet (for real tho).
I know you've probably seen "make music over the internet but for real this time" presented from a handful of places over the years. We designed a PCB from scratch to tightly couple the audio and networking layers as close as we possibly could, and we are able to get latency numbers as low as 28ms using custom protocol (which allows for seemingly real-time performance with bandmates over the internet).
Before you ask, no, it is not an audio interface also (we're working on it). Think of it more like, "point-to-point sound cards with a lot of control over your mix".
Don't really know how to do self promotion, but we have devices for sale for $250 usually (rando $200 flash sales sometimes) and there's a $10 / month subscription (2 months free w/ purchase and free returns). More at https://lutefish.com/pages/pricing
If you are skeptical still, here are a few examples of it in action:
Jacob Jeffries (of Vulfpeck) and Dustin Koester Jam: https://www.youtube.com/watch?v=FRhEZQypt0g 5-Piece Band: https://youtu.be/rcmTLDGN_Y8?t=286 Trombone Quartet: https://youtu.be/xjw_YF-zatE?t=230 Marty Schwartz: https://youtu.be/WCPCbEkl6C8?t=38