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When you write web code you should never have to worry about that. Actually, if you write any user space code, except drivers, you shouldn't have to worry about that. If you have to worry about it, reconsider your tooling very seriously

i've had issues with aws lambda and compiled ai models, because lambda varies hardware and cpu architecture from one container to another

i can imagine this happening if a team has a myriad of hardware/os flavors and different server setups.

Yes, when you write web apps in x86 assembly, it gets tricky.

I'm still on OS/2 Warp.

for x86 or PowerPC?

Talking about rabbit-holes. I used to have prototype OS/2 PowerPC 64-bit hardware from IBM before they killed the project. I should have kept that early EFI-based system. When the EFI boot sequence would panic, you would get an error message of "Danger Will Robinson".

man OS/2 Warp on PowerPC should be really secure because no one is writing malware for that combination!

AWS Graviton is ARM.

My experience is that having a team with mixed platforms has helped reduce deployment woes, with the rare platform-specific bugs getting worked out beforehand.

Nowadays there are automated pipelines that build artifacts for different archs and platforms; this shouldn't be a particular issue.