I wish I had known about that product range! Now looks like the company is shuttering...too bad...that's a great idea, here's the link: Archer Components
I prefer mechanical for it's simplicity and reliability regardless of SRAM/Shimano groupset it belongs too once you've attained the necessary mechanical ability to sustain it (still a learning curve in-and-of itself apart from electronic). I have forgotten to re-install the AXS battery and nearly scuttled a ride...luckily there was a spare battery from a friend. But the AXS shift is...