Nope. Unless you mean only the core bicycle parts. Everything electronic is highly incompatible and unstandardized. Some things fit and some standards are emerging, but for others you struggle to find the right parts, or parts at all.
a lot of it was standardized until individual companies decided to try to divvy up a market and segment it.
so many electric vehicles are running their own version of the Benjamin Vedder VESC as the primary motor controller. They change a minor feature, stop providing source, and then pretend that it's their own design.
But, even so, it's all still pretty inter-changable. Nearly all BLDCs are controlled similarly. Nearly all PEVs are running hall encoders, and if they're not it's trivial to switch between hall/sin-cos/foc/whatever with nearly any modern controller, just as nearly any controller can be programmed for just about any kind of voltage source, be it lead-acid/lipo/liion/lifepo4/whatever.
Things seem a lot more friendly for tinkerers now than ever in the whole PEV sphere. Improvements can always be hoped for, but same as with every industry : you should probably expect to exchange interoperability and freedom for closely-knit support and homogeneity.
