In practice, indexing is the least of anyone's problems. I switch between 0- and 1-indexed languages a lot and it's never an issue, I don't even have to think about it.
I disagree. When immersed in a language it doesn't tend to be an issue, but switching between them absolutely is. Over my career I've had to deal with a ton of off-by-one bugs in code that was prototyped in Matlab then ported to C++. My hope with Julia was that the language was fast enough that you wouldn't have this divide between prototype and production, but given the overhead in using it anywhere but a REPL, it doesn't look like things are going to work out that way.
On it's own, 1-based indexing certainly isn't enough to keep me from using a language though.
On it's own, 1-based indexing certainly isn't enough to keep me from using a language though.