"When we have rewritten from Go into Rust, we found that it takes the same size of team and same time to build it."
Important part here being: rewrite. I would expect a rewrite to take less time, not the same time, than writing from scratch. Yet a Rust rewrite took as long as Go from-scratch project.
So to me, this implies the opposite, that Rust takes longer to write.
Time to build a new system and time to onboard a new team member without professional experience in a given language are 2 very difficult things.
Go is much more optimised for quick onboarding, fast feedback, more “code look” consistency across projects then rust.
Now a team that knows both rust and go well might have the same proditivity in rust and go (maybe even more in rust), but with lots of changes in personell, specifically in quick growing departments, go can make a huge difference.
This is obviously just an anecdote, but i’ve seen more companies or departments running mostly a go backend stack, having job postings saying “no go experience required”, than the equivalent other companies (or departments ) focused on any other lang.
A recent study done at Google disagrees with this assessment.
""it takes about the same sized team about the same time to build it, so that's no loss of productivity",
said Google's Director of Engineering Lars Bergstrom about porting Go to Rust in the talk https://youtu.be/6mZRWFQRvmw?t=27012