On: 55 GiB/s FizzBuzz

[Delk]

It could be, but in most cases it's not due to RAM commonly being unupgradable in laptops.

A larger amount of RAM might still be cheap to install in the first place, but that choice is not always directly up to the consumer.

[999900000999 → Delk]

Correct, but Slack is based off electron and is widely successful.

End users are used to tolerating a basic chat application eating an indefinite amount of ram.

From a business pov it doesn't make sense to spend time optimizing since most users don't seem to mind.