I'm not too worried about the complexity. What I *am* worried about is that your number of SATA power ports on your motherboard will become the limiting factor for how many SATA drives you can connect. The number of SATA *data* ports on the motherboard was not as much of a limiting factor because you can add data ports through M.2 / PCIe adapters.

For example, the "MSI Pro H610M 12VO" hyperlinked in the article has a manual that shows it as having two SATA power ports, and an image shows one such port connecting to a single drive. Now I imagine this is a simplified illustration and maybe each port will have enough power to supply 3-to-4 HDDs (depending on current rating of the HDDs of course), but that's still a max of 8 HDDs. Meanwhile the non-12VO PSU I use has four ports available that can each connect to 3-to-4 HDDs each, so a max of 16 HDDs, and it definitely has enough spare power to support them because I sized the PSU for that need.