I am soon to venture in to SAAS business. Should I be interested in kubernetes ? Is old way of doing things still relevant?
The last thing you want is to be fiddling with k8s when you have 3 whole users and $0 revenue.
Unless your niche strongly requires fancy architecture start with a $5 VPS and take it up from there.
You will never look back and think "shit if only I had used k8s on day one it wouldn't have failed".
More often it's closer to "shit if I had focused on non-tech stuff more maybe it would have gone somewhere ... instead I spent 2 months fiddling with YAML files".
Also if you host a bunch of side projects, it's actually better in terms of resource utilization and separation of projects, it dynamically schedules pods based on resource requests across the nodes it has at hand so you can host several projects fully separate on a single or a handful of nodes depending on requirements.
The opposite of regrets. I suggest k8s or serverless for almost anyone...