awsarch.io was switched over to Graviton2 instance types, as there was significant cost savings, something like 20% if my math was correct. There very little to this blog as it uses some Jekyll and apache. All the posts are maintained in a source code repo as they start life as markdown. Jekyll converts the markdown into HTML.
The os takes care of the differences between graviton2 arm based on the prior intel instances. The performance of t instances is not exceptional, but they scale under load like any other instance and super cost-effective.
Software required which is not available can be built using GCC. I think I had to build on a package, and it worked fine. Tools managed by homebrew had no issues.