Bigdinosaur.org runs Linux. Almost all services are hosted on a t3a.large AWS EC2 instance. The EC2 server runs the standard Ubuntu 20.04 AMI, and these pages are being served by OpenLiteSpeed. This EC2 instance also hosts the Chronicles of George and Fangs, and I'm about to migrate my two tenant Wordpress blogs over to it, as well.
I also host Houston-area weather blog Space City Weather, run by Eric Berger and Matt Lanza. SCW runs on a separate t3a.large EC2 instance with the same software stack.
I host my own e-mail. Figuring out how to do that correctly was a little crazy, but Postfix + Dovecot + Spamassassin works very well, once tamed. E-mail hosting is done on yet another EC2 instance which runs postfox, dovecot, spamassassin, and some other stuff.
(I used to host everything out of my home closet, which looked like the above image, but EC2 reserved instances are annoyingly cost-effective for my use case, so into the cloud everything went!)