Product owner is responsible for making sure the product meets customer needs. Project manager is responsible for making sure the project is completed on time and meets the requirements that are defined by the PO.

Not if it’s for oil based paints.

While true, those companies all have solid revenue streams that aren’t directly related to AI. If a bubble pops they’ll all suffer, but all of them were profitable before the AI boom and can survive without it. It’s very different from the dot bubble because that was driven by speculation and many companies weren’t making any profit back then.

For most applications the overhead of running a second DB server is negligible.

I write software for a living, and have worked with all 3 database options in the past. I don’t know what DB backend my nextcloud server is using, nor do I care.