Bitcoin all the way because not everyone uses Bitcoin cash making their solution not that useful. Imo Bitcoin Cash's solution seems a bit rushed because if Bitcoin Cash was better a lot of people would've switched and their blocks should be flowing with transactions by now. The solutions we have with Bitcoin seems to be enough for now to maintain the low miner fee and if transactions starts to increase in the future there will always be a solution ready to be made.
Exactly. Bitcoin Cash has less usage than Bitcoin in the real world. Even if it has managed to successfully upgrade its block size to 32mb, not even a single block has been mined to date which has reached such capacity. This also applies to its launch in August 2017, where blocks didn't even reach the 8mb limit. As such, the space available for large transaction capacity is wide open for users to enjoy, but at the cost of centralization as the bigger the blocks, the less nodes would be able to maintain their storage costs.
On the other hand, I believe that Bitcoin is the way to go with SegWit and Lightning Network since it safely scales the blockchain without harming the decentralization of the cryptocurrency's main chain. In addition, sidechains will extend the functionality or use cases for the Bitcoin blockchain, and allowing Bitcoin to perform as an All-in-one cryptocurrency for everything blockchain in the mainstream world.
Despite everything, it would be interesting to see how the future of both Bitcoin and Bitcoin Cash would turn out to be. They have their unique features and distinct visions to make cryptocurrency scalable and accessible to anyone in the world. If decentralization remains as the value proposition of these cryptos, then there should be nothing to worry about. Just sharing my thoughts
