What are you using as a master clock now? Some drum machines have cv clock inputs and outputs (RD8 and RD9 for example, and I assume the Elektron stuff too).
I’m a bit more excited about modular drums than Ronin, but I agree that the expense and necessity are probably unnecessary for some. I really enjoy my hybrid setup. I have an MPC but don’t really use a lot of samples that I don’t create myself, so I like the versatility of a decent enough drum machine and modular options. I’m usually happy with standard 808/909 sounds but the BIA and WMD modules are fun. I’ve been building some percussion sounds from scratch too, so everyone will do it differently. The MPC One and RD8 also have trigger outputs to interface with the rack. There are a lot of different ways to do the same so just continue to do your research to find the right option for you.