Wordpress if far ahead of others in PHP support event it is the most insecure one.. that causes the most issues...
I use cPGuard and Scan for outdated CMS ans send weekly warnings to customers that do not updated
I was wanting to change my TOS and enable that new feature but others at WHT stopped me saying that we need to educate customers not to break their sites so now it is email notification only
Auto Update Vulnerable Wordpress core, Plugin or Theme
Forcefully update a wordpress core, plugins or themes that meets conditions below
if there are vulnerabilities with a CVE score greater than 6
if it's been more than 7 days since an update was released
This is how extreme I'm ready to go with updates ...
and the wordpress is over 90% majority what we host
BUT We need old versions for compatibility mainly - if a dev take new client and decide to host it with us they move it / move a copy - and start reworking the site on our hosting (they move to us because speed is great 5950, 7950 EPYC 4004 vs 2680v4 from where they are moving ) So we need old versions during conversion process ...
If I keep 2 PHP versions for compatibility and reworking (7.4 and 5.6) I cut that server from newer versions with only 4 available
Also devs on my servers reworks Open Cart Scripts (cPguard scan them and classified them as outdated - Safe) but they still require exotics like 7.1 so If only 4 versions are allowed i can offer only one new on the server where devs are working
SO I need more than 4 versions available at least for couple of months until the server is declared full
and before someone say use Cloud Linux - I believe the age of RedHat aka Prominent North American Linux Vendor (for those which remember) Clones for shared hosting is ending ... The original of which sources CL / Alma / Rocky build of and made to be 100% binary compatible It is not make their linux for our market... their current situation if perfect for their customers but not fit for cloud and hardware support is limited in the second 5 years of the OS lifetime , upgrade possibilities of the os are by third party and this product cycle skip us (DA and Plesc customers are adviced to move to 8 server not to run elevate...)- and can make long explanation if someone is interested
Debian and Ubuntu with their easy 10-15 minutes next version update - are way more fit for the cloud and for longevity and for change of virtualized hardware every couple of years...
Also that save me of the RH Clones death cycle - a lot of good small providers is selling their business around EOL of RH versions because work for migration is too much for them