Now that from Android 8.0 (on Android 8.1 it's a bit different history) it's possible to turn mobile data via a single touch on the mobile data toggle from the status bar just like you can do it with Wifi. And don't jump on me saying that this way possible to do on several phones since a few years ago and bla bla bla because tasker can't do this, only with root bla bla bla.... I'm talking about pure Android, on Nexus and Pixels phones. I think that this applies also to AOSP.
Well, what I'm trying to say, if now finally we can touch the mobile data toggle and have mobile data turn on instantly (except on android 8.1 unfortunately) without having to go to settings or whatever, just like the wifi toggle behavior has for ages, maybe, just maybe, there's some possibility to had to Tasker the ability to control mobile data just like we do the same with Wifi, right?!