Also the route created in mra cannot be sent to my garmin.
As I wrote previously on these pages, I am not a massive fan of MRA (I tested it with a paid Gold subscription for a few months),
but you
can send the routes to any Garmin GPX and MRA also provides different type of GPX export, along with the explanation of what that entails based on different GPS devices/brands.
To be pedantic, if people wanna play that game, Basecamp is not free. Its development cost is subsidized by Garmin's hardware sales (and its roadmap affected by those too). Reminder: it is also - for the millionth time - no longer actively developed or maintained. In software parlance it means that, sadly, at some point it will stop working properly on modern machines.
Signed, another (current) happy Basecamp user.
MRA has a few very useful features (easy sharing/embedding and Michelin map layer being a couple) I appreciated.
There is (or should be), usually, a variety of software to cater for a variety of use cases. People choose what they prefer or is better for their workflow.
Nothing was going to get me off my Garmin and Basecamp “addiction”
"Lock-in". It's called lock-in

One egregious example (or, at least, one I lived previously) was the migration from Quark's Xpress to Adobe's inDesign back in the day, in print software.