I'd disagree pretty strongly. You may evaluate the tradeoffs and decide to go all-in on a single cloud (and you should do that analysis!), but it's far from a given. You're not wasting engineering time if the costs get out of hand and bankrupt you. Managed services may accelerate your time to market, but they do so at the expense of lock-in and your bill.
Context: I work at a startup that benefits enormously by avoiding AWS/GCP (for most cases) and renting cheap dedicated servers. It is context-dependent; our exact business doesn't benefit much from managed services and really needs big servers.
Context: I work at a startup that benefits enormously by avoiding AWS/GCP (for most cases) and renting cheap dedicated servers. It is context-dependent; our exact business doesn't benefit much from managed services and really needs big servers.