I don't think GKE is lockin when there are other offering from other companies and the migration is quite simple. Also if at some point you feel like it's time

I don't think GKE is lockin when there are other offering from other companies and the migration is quite simple. Also if at some point you feel like it's time to host your own then you can do it. Also I don't find GKE that expensive especially paired with their cheap vms or preemptive vms if you're fine with those.