

The p2p meshnet that they were referring to basically is a local/small group ISP.
As for why a single person cannot (effectively) become their own ISP? It’s complicated. Really complicated. ISPs have to pay other ISPs just like you and I do, unless they’re a Tier-1 ISP/Network. Otherwise you’re always going to be paying to connect to (and generally paying for bandwidth) another network that has access to a network that then has access to a T1 network. T1s are basically the largest networks that hold (or can directly access) the majority of people on the internet. Top of the food chain, so to speak.
So in theory, yeah, you can become your own ISP - but you’ll still need to pay and be at the mercy of other ISPs. Datacenters are typically their own ISP, but they have to pay others to get online just like we do.
Just to chime in with my own opinion on JetBrains’ tooling, my first language was Java - admittedly its been a while since I tried Java (and other JVM languages like Kotlin) in VSCode but when I last did it was a bit of a challenge. I also did some Android development for a while and if “standalone” Java was awkward in VSCode I assume Android development would have been too (Android development in general was nightmare fuel until Android Studio came along, never really did like Eclipse all that much).
After expanding out into other languages, I have enjoyed the specialization of each of the JetBrains IDEs. VSCode always felt like a “Jack of all trades, master of none” type of experience for me personally. I have tried out Zed recently and while I think its going to be a decent editor, I still have similar issues with it that I have in VSCode (in that how well it works depends on what language you’re using).
The exception to their tooling that I haven’t really liked though is Fleet - which was their answer to creating an equivalent to VSCode. It hasn’t really seen a lot of development and feels more like the forgotten step child of JetBrains. Also the “Remote Development”/JetBrains Gateway features can be really hit or miss though thankfully I don’t need that sort of functionality often.