I am a recent convert to TANE.
I bought TANE back in November 2014, was unhappy when I found my PC was not able to run it to my satisfaction, I saw no advantage over TS12 so I left it alone until January this year.
I finally did a partial upgrade to my PC on a limited budget (pensioner). I was so pleased to find that I could run the simulator at a decent performance level.
I imported a resource hungry TS12 route that I had been working on and found a massive improvement when running it...so I now run only TANE!
I am discovering new things each time I use TANE, I even prefer the content manager now, which I disliked at first.
There are no lags like in TS12 when surveyor kept checking database, no long winded asset checking, and a superbly fast database rebuild tool that does its job in a very short time, not the 20 minutes that TS12 took
Take time to adjust the settings according to your machine and you should be satisfied with TANE if your computer has the spec to run it.