The only time boot times _might_ be a genuine issue is if you have an autoscaling group in cloud ; if your boot time is too long, by the time you scale up, the spike in traffic has gone (yes Windows Server, I'm looking at you). Chances are though, if you are scaling that dynamically you would be better off using something cloud native instead of VMs to do the task.
But otherwise, my laptop gets rebooted in two situations: 1, I forgot to plug it in and the battery went flat, 2. Bios updates. Probably about once a month, I can live with that.