It appears so [1]. It's surprising how far behind most non-tech industries are when it comes to legacy software (not sure I'd call Apache "legacy", but still). I'd also be interested to see the stats for IT/developer positions in tech vs. non-tech fields. My intuition suggests that there are a lot more Apache sysadmins than you'd think.

[1] https://w3techs.com/technologies/overview/web_server