Interested to know what subscribers to Zwift think about it. I.e. your pros and cons list.
I’ve been playing with it since the first of the year, but plan to cancel later this month.
In years past I occasionally logged in when 15km free per month still worked.
I took a deep dive this year, but it’s really not my thing. I’ll post my why-not list soon.
In the meantime, I’d like to hear from some diehard fans who I presume are into ZRL which literally means die hard. 
I Zwift, I occasionally race, where I’ll definitely push myself harder than at any other time. But mostly the gamification aspects will get me on the trainer when it’s not nice enough to ride outside.
I use it mainly to do my workouts, really like the way the arches appear in the distance which gives you motivation to push to the end of an hard interval, maybe that comes from my time as a time triallist and seeing the finish line, but I find it much more motivating than just using a workout player on a phone, I started out a few years back using TR and got sick to death of the blue bars 
Also use the pacer rides in lieu of doing an ‘endurance’ workout, again, find having to change gear, keep with the group much more engrossing than just staring at a number for an hour or more, particularly for ‘zone 2’ or endurance work, found in the past when I’ve tried to use a workout player that I die of boredom almost.
There’s also the gamification of leveling up and ticking of challenges, whilst not really of any importance, it just adds something a little bit extra to what is essentially quite a boring activity (riding indoors) I used to quite like video games in my younger years so I suppose I’m a bit pre-disposed to that sort of thing.
Never really got into the racing, too many varibles for me to take it seriously, by that I mean power meters reading low/high and the weight thing, as I said earlier, I used to race time trials and there’s no effect on the outcome of the race if someone is lying about their weight or their power meter is reading 20 watts too high, fastest person wins, I have tried a few of the races though and they are great for pushing out time to exhuastion if that’s something you are looking to develop.