No this is different in a sense that you can still use and make objects for your current versions if you like. There's nothing wrong with that. Even though you are developing for the older versions, there are places to upload to such as TrainzPro Routes, which is a superb place by the way.
Your older content still works in the newer versions, which means you could most likely create a new config file and upload to the DLS because most of your content doesn't include scripts, at least you didn't do that before. I really do like your buildings by the way, and use them all over the place in TS12 without any issues.
Unfortunately N3V has made the uploading process different. Perhaps someone could upload your manually updated products for you.
I agree that not allowing the older versions to be uploaded is wrong as long as the content is error free through out all versions. There's no reason why TS12 couldn't have had a versions checker, and ignored certain things in the older configuration files, such as some of the tags that are no longer supported, etc. Instead they chose the easy way, which is an all or nothing approach.
In some ways Auran did this to move the program forward, and provide error-free assets out of the box. I can see why. Having a system like this means less support calls, and far less frustration from the user base.
The shear number of assets on the DLS that would not work without a tweak was/is quite amazing, and I don't blame anyone here. In part this is due to vague and non-existent CCGs at various times during the programs growth, so developers had to literally wing it. In this process they copied some config files, but these had typos in it, and with these errors and minimal error checking, the problems propagated rapidly. I think that the problem escalated faster than Auran could have imagined!
Anyway, the world is way different than it was only a few years ago. There are a lot of NOOBS out there that have no inclination on how to create and build. All they want is plug in and go, just like the stuff for the X-Box and other gaming platforms. It's a shame really. There are some exceptions, of course, but I see this in various places today, and not just here.
So this brings up an other thing why the changes that have taken place at Auran/N3V, I'm sure there's not much left of the legacy crowd, meaning that it's more difficult to support the older products, and they would rather focus their energies on newer stuff because supporting older versions can be very costly. I saw this when the Polaroid spin-off I worked at downsized rapidly. Their DryJet printer went off to the scrap heap immediately with no support for it as soon as they could legally ditch the product. Older RIP versions went to the grinder, and only the latest Harlequin 5.x and higher was supported. All older customers were "force" upgraded to the latest versions of Harlequin RIP, and if they didn't they lost their free support. If customers called with the older products,they had to pay per call. It's all about revenue and meeting the bottom line to cover salaries and overhead. Nothing personal here, but it's how companies work.
John