I'm sorry, I'm not against using 3rd party services, but such a strong statement about so relatively not complex functionality I've heard 1000s of times in my 2

I'm sorry, I'm not against using 3rd party services, but such a strong statement about so relatively not complex functionality I've heard 1000s of times in my 24 years career and these never stood itself for long. Every then and now I hear some IT "priests" screaming don't do this, do that and people follow it. But I see it always leads to something being "cheap, easy and fast", being actually expensive (at scale), difficult (to adjust to specific needs, holding back the business) and slow (because of all work-arounds) :-D Companies literally burn a ton of money in long run because their CTO can't get them proper evaluation of what is really needed for their expected scale. And even large business with billion of dollars revenue may not need really an infrastructure of google scale.