Re: "Serverless" is a marketing term. No more, no less.
"ideal for SME's"
Maybe not even them. I had an occasional client who had an engineering supplies business - store-room, several counter terminals and printers, office PCs and more printers, all running on an in-house server. As a customer, I can go to a branch of a national chain of builders' merchants and the transaction is handled through a server sitting there in the office. If their comms went down how would they manage with the data on somebody else's computer? The small business, maybe, but a catching up after a couple of outages wouldn't leave them very pleased. The national chain - maybe the beancounter says No - must record it properly.