Even with El Reg's audience, this article seem pointless at best and some kind of "Please give Amazon some love' bullshit.
It's about long termism.
If you're developing 'enterprise' apps then they're generally long lived. Often much longer than the services offered by the various cloud providers. Companies don't want to have to re-write everything every few years if it fulfills a busines need. You don't rebuild your offices every 5 years, it should be the same for well written software.
If you're building this kind of stuff then considerations like 'Will google just randomly remove this service the second we go live?' (The answer is usually 'Yes'), become important.
I've used two of the 3 big cloud providers over my time and would activly push against Google because they do like to kill stuff on a whim and I wouldn't want to base my business around a company that does this.
AWS, as an example, deprecated a service we used at a previous company. They gave us many years notice, and I think the service still worked long after we'd moved away from it. This meant we could plan the deprecation in along with all the other work we had to do on the product, which, as a small team really helped. We simply didn't have the capacity to be constantly updating the software for structural changes and also add and maintian new features.
This approach from AWS (and googles reputation) have driven descisions I've made in my career since.