These are the reasons I went Wheeltop, I intend to upgrade one wheelset to 12sp and leave the other as 11sp. I hoping that wheeltop, in the future, add a wheel/bike profile feature where you can setup different indexing for different wheels and then swap between easily.
With this flexiblity the Wheeltop isn't just cheaper, but it's also technical ahead of Shimano and Sram..... in this specific area. Downside of flexible configuration of indexing and gearing is that it can take a lot of work to get it perfect - as I am finding with my GeX ATM, some learning on my part. So for Sram and Shimano, if they want a great customer experience and minimize support calls, having it 'just work' Apple style is important for the wider consumer market.