[Adiqq]

I don't have much contact with cloud, but it just seems expensive and unstable in practice from business perspective.

Cloud offers standardization and support, so in some cases it might be preferable, because it meets requirements without spending additional time on setup or operations, but eventually cost might become problem, especially if cloud providers will decide to increase prices and you can't easily migrate it to on-premise.

Probably it's best to stay hybrid and be always ready to at least change cloud providers, so you need to avoid vendor lock-in. That sounds like cloud native, so why bother with cloud, if you can have some servers, use them with Rancher and create Kubernetes clusters?

There will be some overhead, but your company controls servers, can easily migrate also to cloud, if needed, provides most functionality that most teams may require and depends only on electricity, internet providers and workers required to operate some data center, so it can always choose cheapest option to operate.