I don't see how the bootstrapping problem is linked to multiple implementations. > Shortly afterwards, people can only use the language if their tool chain, op

I don't see how the bootstrapping problem is linked to multiple implementations. > Shortly afterwards, people can only use the language if their tool chain, operating system, etc. closely match the understanding of the language authors. Perl, well-known for being an iffy language to install and running on a restricted set of OS/architectures.