Quote:
Originally Posted by raymor
A little CSS - no problem. Anything more complex, involving application logic, cheap or even moderate can cost you big time in the run. When application logic that belongs in plugins is incorrectly put in templates that creates technical debt nectar you'll later have to fix it, possibly re-doing it fun scratch when Wordpress is upgraded, etc.
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wp code in themes is fine, no need to create a plugin if you dont really need it.
and it will still work after upgrades, nothing should prevent that or you are coding it wrong.