If you read Reddit r/LogitechG threads there are post ages old complaining about the G-Hub software, this is why.
If you upgrade your older Logitech mouse or any older peripherals, you'll have to upgrade to the G-Hub software to run your new tech. And then run G-HUB and LGS at the same time, and they do not like working together, so all your older Logitech peripherals will work.
As G-HUB is not backward compatible, players are either forced to buy new keyboards, mouse, headsets etc that run under G-Hub or try a find older Logitech products to replace what worked under LGS software, as I tried to do, which for most players is replacing their WHEEL TILT MOUSE!
NOW if G-Hub worked as well as LGS, the dodgy non backward compatibly issue may be over looked by players and they might go ahead and buy everything new and then only run G-HUB.
BUT! G-HUB is a software wreak and is known as G-Dud as the Reddit thread shows. So players want to keep using LGS software, it works, and not rely on Logitech G-HUB software
Enter Corsair.
So the ball is in the Corsair court, make a wheel tilt mouse, long the lines of the logitech 502 and I and others will gladly jump ship and buy that mouse and a new Corsair keyboard, thus am able to keep running my G19 LCD and all my apps with LGS software running and not have to worry that my gaming peripherals, will all freak out and stop working.
For those weirdly speaking on behalf of Corsair saying stop bothering the Corsair developers, and asking, I say this. I already own two Corsair water coolers running expensive rigs and it's in my interest to have all my peripherals, under the same software. Beside Corsair will make a buck too. :)