what happen if you do not update your software?
your company fail to meet data security policy standard.
your software / system might fail to function as it should.
your application might get slower or even crash.
you risk loss of data, because all known ransomware and most malware works by targeting certain known bugs on old apps.
warning: test and validate updates!
some updates could break your system, like the case with KB5043145 and CrowdStrike update.
test your update before mass deploy to all systems
never automatically install non security / non critical updates
do not install feature updates unless you really need the new feature
turn off ‘Get the latest updates as soon as they’re available
refs:
https://www.cisa.gov/news-events/news/understanding-patches-and-software-updates