That's a philosophical question 

A backup or snapshot does not hurt - so do it!

I have upgraded several systems to version 24.2 and they are still running ...

I can agree with Dithmar, the update to 24.2 went without any problems internally or with customers.

One thing with an all-in-one appliance, the update took me more than 45 minutes internally with the upgrade of the DB. To see what is currently happening in the update, I look at the process list live and sometimes also have live access to the tail -f log data to assess it.

Whether the correct rpm was installed during the update is unfortunately not trivial, a query with rpm -qa still shows the Filr 5.x version.

Helpful is:

cat /etc/Novell-VA-release
product=Filr Appliance
singleWordProductName=Filr
version=24.2
arch=x86_64
id=filr-appliance
updateRegcodeKey=regcode-filr
updateProductName=Filr5.0

cat /etc/Novell-VA-base
product=Micro Focus Base Appliance
version=2.2.1.2
arch=x86_64

Greetings George

24.2 works here.

I see two problems that occurred before 24.2 and still persist:

1. https://portal.microfocus.com/s/article/KM000028195 - still persists, the FTF sent by Support does not work.
2. still access token refresh errors in the logs.