As another solo dev running a SaaS (7 years), I mostly agree. I stopped doing sales and coupons, it's a lot of effort for little practical gain (in a B2B SaaS you really care about the long-term, not hooking customers based on quick promos and coupons).
But complexity will catch up with you eventually. There is just no way around this. I read the article and I agree with most things there — my system is somewhat simpler, but I do have "features" and feature overlays, which let me override entitlements in specific cases. This gets a lot of use. And right now I'm working on plan overlays, so that I can offer custom plans when needed — and believe me, it's not because I have too much time on my hands, it's because I started to really need them.
But complexity will catch up with you eventually. There is just no way around this. I read the article and I agree with most things there — my system is somewhat simpler, but I do have "features" and feature overlays, which let me override entitlements in specific cases. This gets a lot of use. And right now I'm working on plan overlays, so that I can offer custom plans when needed — and believe me, it's not because I have too much time on my hands, it's because I started to really need them.
Obviously don't do all this when you start.