I doubt it would mean much, you don't even need to self-host git just use gitlab, bitbucket, etc. Hobbyists and small projects would be the most affected but VPN's are a trivial solution for this demographic.
The code you need to read, the bugs you need to file and the downloads you need to make from every other project will still be on GitHub. I don’t use GitHub for issues or version control at work, but I’d be significantly slowed down without it.
All those things can be painlessly done with a vpn. I'm not saying people wouldn't have to change, but to affect the economy as gp is trying to make it sound well, doubt it would even make a rounding error.
>Imagine how many juniors cant, and imagine how many of those might life in india.
I can't imagine a junior developer not being able to set up a vpn in 2023, and if by some bizarre turn of fate he isn't able to he is a junior and other people will just tell him how to do it.
>And even if you ignore that fact, can you imagine the hit the gdp will take if thousands of companies need to setup vpns?
No? vpn's are cheap and honestly I doubt most of the companies need to read github code*, and those that do well just use the vpn. Hell you can even not pay for it but use opera's free built in VPN, use Tor on clearnet as a VPN of sorts, all for effectively zero cost.