Ditto for any theme or plugin that tries to be compatible with all versions of PHP that WordPress itself supports.
IMHO the term "developer" should not be applied to those that can just ship but rather those who can also build.
It doesn't matter if they are web, desktop, nor low-systems developer actually
Most auto-called web developers are just "web masters"
No True Scotsman puts sugar on his porridge, and No True Developer just installs WordPress.
On the other hand, even Rails and Django encourage you to use the ORM whenever possible, so even a "developer" who builds apps on a modern framework is unlikely to be familiar with advanced SQL features.
Do people really consider ./configure && make && make install and its equivalents to be development now?
Last time I checked the WP install process was something like...
1. download zip, extract
2. change your some config file
3. upload whole folder using FTP
4. go to /install or something, and from there..
5. click, click, click, edit text, click, click, click ...
That was only if the web developer was in hardcore mode, otherwise it was just _log into cpanel to use one-click installer_