any good alternative? the service looks neat, but it has been discontinued

draw.io is a good alternative . By default it does not show icon for cloud services but if you click on "More Shapes" option at bottom left, you can add AWS,Azure and GCP and create all sorts for architecture diagrams. Plus, it is opensource and can run your own self hosted draw.io app from github.

Lucidchart Cloud Insights is another player in this space. Full disclosure, I'm part of the team that created it: https://www.lucidchart.com/blog/lucidchart-cloud-insights

We are long time users of Lucidchart and were using the predecessor of Cloud Insights, AWS Import, for creating cloud diagrams of our existing AWS infrastructure. In February, a LucidChart account manager contacted us stating the AWS Import feature would be sunsetted. He offered to onboard our team onto Cloud Insights but we would have to upgrade to an Enterprise account at $199/license/year AND pay $4,000 a year for the Cloud Insights add-on that covers only up to 50 compute resources. We ended up keeping our account as-is and never heard back from the account manager.

Lucidchart is a great product but we were really turned-off & disappointed they essentially took a feature away from us.

Excalidraw is nice once you get the hang of it.

cloudcraft.io is OK