TRS19 is vastly superior to TANE.
The above commenters seem to be talking about their 15 year old built routes not working well in a brand new sim. No duh. New features and progress sacrifice old stuff.
Fine, if you don't want to use all the older routes, and that suits you, bully for you. But it may not be the best fit for others.
I see you have so far made one route for the DLS in 2010 .Have you made ones in TANE recently that you want to port to 2019 ?
Perhaps you might consult with a few people who have made routes in 2019 and have had a lot of issues with the app screwing up sessions etc, from reading here its not any better than TANE in that regard. Bear Creek is brand new, made in 2019 , to take advantage of the features you need a 2070 or 2080t1 and even then Horace says it ground to its knees when he used certain assets.
If you are happy to junk all the high quality old routes and just rely on new items you haven't got a great deal of choice have you ? There aren't all that many high quality routes just made for 2019 are there ?
I'm also thinking about routes that are supposedly updated to 2019 standards which ship with the app, I ran one last night and it makes use of many really old vegetation splines that look awful, really, really primitive. until NV3 get a decent set of high quality vegetation that works with the new version why would I bother to move all the stuff I have ( including one brand new tane SP3 route I've worked 3 years on and a revamped 50 mile NG route that takes advantage of all the better features of TANE ) over to it, update it all ( which would take months ) when it doesn't look much ( or any ) better. We have a discussion on another thread about how trees made by long term users wont look good in 2019 . Another sacrifice one would have to make to move over.
Just bear in mind there are a lot of people who make routes that aren't contemporary,and for which there are a scarcity of assets available. if you are happy just running and making modern routes fine, then 2019 is pretty good, but if you want to run say Durango and Silverton 1895, then there are going to be issues with rolling stock and other items that need to be fixed before they will work in the new version, all this takes time when one could be doing more interesting things. .