I agree with the others. Two completely different sets of tools that usually play nice together.
I use the "includes" extensively with ADDT, and that is missing with any WA products. I also notice some WA products don't like includes and lose their paths. Dyanamic menu for instance, I just can't get that to work with includes. Yet the old Interakt menu had no problems.
I personally prefer Nextensio Lists (ADDT) to WA's "Data Assist" (2 pages rather than 5) and I'm a die hard with KTML over iRite. KTML in ADDT (you need to hard code it) is still easier than iRite in my eyes. I fully understand that iRite is 1st generation, so it has a lot of room to grow.
eCart is Fabulous. I miss the ease of adding options and/or discounts through the database (like the old MX Kart used to do) but the WA system is much more flexible when a client says (I need this discount, on these products, when the price is more than xxx, but only xxx number of items in the cart, and a herd of buffalo walking by). Oddly enough, the WA system can do that - LOL! Well, not the buffalo, and it can only be done at the developer level, not by the client with a database entry.
I am really digging the ease of CSS Sculpter. Worth every penny, even if you just use it to analyze Eric Meyers code. Very good product.
Many are quick to abandon ADDT, but the code is very good in those products. With the odd tweak over the next 2 - 3 years you can make it last until a PHP version makes it obsolute. PHP 6 won't break it so we'll have to see what 7 brings, and that is going to be a few years down the road. Security is not really an issue. Most security problems are due to injection - and the folks at Interakt (Adobe?) handle that well. It also doesn't take long to sanitize an incoming variable if it wasn't taken care of to begin with.
With that - the folks here at WA are working hard and making some great products. I am confident that by the time I absolutely need to drop the features ADDT has over WA they will have the solutions for it.