It's definitely quite popular inside Google itself, where all sorts of small and one-off systems are built and deployed entirely in AppsScript.
And it has had significant updates as well.
The newer runtime is based on V8 using some clever way to isolate the code. Previously they used Mozilla Rhino as the runtime because it was easier to sandbox, but it was also very frustrating to work with.
Now the DX is much better with more recent and performant executions and a better UI.
If I sound like a sucker it's because I am and building with Apps Script is fun even with its limitations.
While Power Platform in comparison might be 100x more powerful for all I care and I still wouldn't touch it with a 10ft pole. Most frustrating experience I ever had.
And it has had significant updates as well. The newer runtime is based on V8 using some clever way to isolate the code. Previously they used Mozilla Rhino as the runtime because it was easier to sandbox, but it was also very frustrating to work with.
Now the DX is much better with more recent and performant executions and a better UI.
If I sound like a sucker it's because I am and building with Apps Script is fun even with its limitations.
While Power Platform in comparison might be 100x more powerful for all I care and I still wouldn't touch it with a 10ft pole. Most frustrating experience I ever had.