This is a popular question, and my answer has been the same from day one, and it won't change. This setup I have right now with being independent is just how I like it.
Many want me to hire more people because they want the game faster. But getting the game made faster doesn't mean it's the same product. The way I see it, if it were released faster, it wouldn't be the same game that I would create on my own. I know the game would suffer because I wouldn't enjoy making it that way. The reason why many enjoy my games is that I enjoy making them.
As for the load increase with Steam and GOG, the workload increase is now minuscule after setting everything up. After the Season 2 release, the workload has decreased back to normal, and I can focus on game development again.
Increased workload comes from increased popularity; more players means more time for customer support. Luckily, I have awesome mods/admins/testers and a whole community helping out with that.
I am confident I will be making games this way until I stop making games altogether. Expanding is not on the map for me.
Then I got headhunted by steam to be included in their curated catalog – as they opened up their site for adult games. That felt incredible.
I've been contacted by multiple AAA developers, showing impressive CVs and offering their knowledge to work with me. It's very humbling, but as many of you know by now, I have no desire to add anyone to my projects, regardless of experience – I love doing this alone.