I agree about the heavy (high) file count on ADDT.
But just to illustrate
I purchased Universal email 4 as I wanted to email from a recordset and have some control over delay.
Reinstalled all my extensions ( 1 hr later)
Managed to get some code onto the page
Insert Icon for UE has vanished? OK that must be to check your awake and have watched the video.
Can't set up a proper trigger to only fire when page is inserted into database.
do that manually
UE server behaviour disappears.
Go back to basic FORM POSTED trigger
Email still doesn't work
Keep looking and tinkering to find out what's wrong
2 hrs later - chuck the whole thing away
Revert to ADDT
1 minute later - job done and working
ADDT is more structured an better integrated
they may have discontinued it - but I still don't see an extension developer that toped it