Thanks to LobsterRoll for starting this poll! We've contacted the vendor on your behalf and they've made the Samsung 256GB Micro SDXC EVO+ 100MB/s available.
I'd be down for a 128GB, as that's the biggest my phone and tablet can take.
I currently do not own any devices that can utilize a 256GB micro SD card, but I appreciate it being available for those that want it.
Need to go faster.... these cards are ok but if you want to do a lot of transfers of large files, I'd recommend faster. I added the samsung pro+ model. Some of these cards won't even max out USB 2.0 speeds.