Hi Koehlernic,
It seems you’ve been here a while and you read few posts.
This issue was raised at least a couple of times now and the answer will probably be the same in your case.
Don’t rely on integrated apps when you can have standalone installations in your system. Things like Nextcloud, OX or others will happily link with UCS LDAP and Keycloak, but you get reliable updates from the vendors direct. Worst case, use docker capability within UCS and run your own containers.
UCS serves as a great user/device manager, environment core element, but expecting all the bells and whistles that once were available is unrealistic at best.
Personally, I don’t get the nubus bit, but then we don’t use K8s at all. Maybe there’s enough market interest for UCS to offer the product, who knows.
To sum this up, I’ll use line from this year’s Eurovision Song Contest… “No stresso, no stresso, no need to be depresso” 