Yay. I ride Pirelli ones, but RideNow from Aliexpress are fine too. They are lighter and better rolling, more compact and I feel they are less likely to puncture (and if they do, more likely to puncture with a slow leak so you might get home just by re-inflating it). There are no downsides compared to butyl imo, besides the price (which isn’t an issue if you get cheap ones from China) and I puncture so rarely I don’t care about the added cost.