If you can spare the overhead, Perl is a good option for some of these. Much of the CPAN ecosystem will still work, and anything written that doesn't require much/any external modules it will almost definitely work with no changes. There are plenty of Perl scripts kicking around from that time, and earlier.
The biggest problem would likely bad code quality standards of earlier periods (lots of budding programmers in the dot com boom wrote a lot of poorly done code that survives today, which is responsible at least in part for Perls reputation as write only), but if you're just deploying your own code, that's less of an issue. Perl can be written to be readable and obvious, it just takes control. In that respect, I imagine it's a lot like C.
The biggest problem would likely bad code quality standards of earlier periods (lots of budding programmers in the dot com boom wrote a lot of poorly done code that survives today, which is responsible at least in part for Perls reputation as write only), but if you're just deploying your own code, that's less of an issue. Perl can be written to be readable and obvious, it just takes control. In that respect, I imagine it's a lot like C.