Would the default route table do that job? Subnets would be associated with that if they weren't explicitly assigned to another route table, right?

Yes. But i prefer to create my own. Create a riutetable, call it “public” using a tag, attach the internetgateway and attach all public subnets, add a default route that points to the internetgateway and you’re done

I'd contest that this is everything that you need to know. Or perhaps more accurately, everything I need to know.

It's certainly not intended to be exhaustive and I am definitely not a network engineer but I think you could operate at a reasonable scale within a single well laid out VPC. Of course there'll be a point for peering etc. but you might not need that.

That's good feedback - thank you.

Network ACLs have been pointed out as missing from this before but quite a few people said that they were right not be included. I didn't put them in because I've never used them so didn't fall under 'need to know' from my perspective.

IPv6 is another point of contention but again it's not something I've ever used and so, apart from any other controversies with it ("...IPv6 which is only marginally better than IPv4 and which offers no tangible benefit...", https://varnish-cache.org/docs/trunk/phk/http20.html), I'm not qualified to write about it.

EIPs and ENI should probably have been in there but I don't tend to use those that often either so they didn't occur to me.

I'm not sure that VPC Gateways, DNS or DHCP are necessarily need to know things either. VPC Gateways are for a specific routing optimisation which not everyone is going to need. I didn't know the details of the DNS set up for a VPC so thank you for that.

Thank you for the feedback - I really appreciate you taking the time.

Flattery will get you everywhere. It's a Jekyll blog so I'm sure RSS is just a plugin away. And then I'd better write some more content...

Thank you! But seriously, do you rely exclusively on Twitter to get the word out that you've posted something?

I'm just so curious how people do this in the Modern Age. I am totally dependent on RSS readers to subscribe to things but I feel I am living in the past. I get that Medium tried to address the distribution problem, but not everyone posts on Medium. And I get that everyone posts things on Twitter, but I want to scream when people say just follow someone on Twitter because obviously there is a very, very high chance that I will miss if someone posted something new because Twitter is not meant to be read comprehensively.

This is very good.