Well, voted for four stacks

Genesis has been the main stack for me since late 90s. It's still in use on my main A1200, but then I've installed Roadshow on two lower end A1200s. Those two a1200 computers actually have Genesis, Roadshow and MiamiDX installed and I can use any of them according the current need

I've been using MiamiDX on my main a1200 too when I need broadcast functionality, but not usually because of its slowness. And then I have older AmiTCP/IP on A2000 and A600 still...