Docker performance on current Intel Macs is much worse than Linux. So if you're building software to run on an x86 Linux server, dealing with ARM-based MacOS is going to be even a bigger PITA: as both the arch and the OS will be different. I am definitely in the camp of replicating server setups on my laptops, so as sweet and incredible as M1 is, I won't be able to use it.

But for new projects, I honestly do not know what will people do.

If Amazon continues to evolve their Graviton chips, and other cloud providers follow, it will be quite tempting to try a 100% ARM setup...