Firstly, we aren't having issues; we have full transparency. I'm also not new to this and know a thing or two.
Our stack is currently sitting at a "three nines" (99.9%) availability level so far this year. That equates to about 9 hours of downtime out of the 8,765 hours in a year. If I offered a service level agreement (SLA) for the TC stack -- which I don't since it's a service I'm providing free of charge to the community -- I could equally compete with Kimsufi.com since they offer the same 99.9% SLA that we are effectively experiencing. ISP failures don't count against SLA's since it's wholly out of the providers' control. So, to be clear, we are currently matching an enterprise availability right now with the little bundle of processing power that is sitting at my feet. I'm pretty stoked about it actually.
That said, I can't justify paying the 100€/month it would cost for something equivalent to my current hardware (12GB of RAM, 16 cores, 32 threads, gigabit Ethernet) from Kimsufi or any other VPS provider for that matter. Now, the TC stack doesn't need all that much power or space, so it might be happy running on something in the 25 or 15€ range, right? Sure, but even with that all we would be gaining would be a higher hardware up time of maybe 1-2 hours per year max, save a catastrophic failure of my server. This forum isn't active enough and the build server doesn't receive enough traffic to merit that cost when I already have its equivalent... and it's free for me... and everyone that uses it.
Now, If everyone wanted to pool up and donate around $1000 USD total, I could buy another one of these lovely Dell servers and we would have a fully redundant system with something in the "four nines" range of high availability... or higher. I personally don't think we need that level of awesome
Honestly, we could incur a decent bit more downtime before I would consider transferring to a VPS; 99.5% availability (~44 hours a year of downtime) would be the worst I would let it get.
TL;DR The reason it (might) feel like we are having a lot of downtime is because I'm announcing it. Your favorite VPS company won't do you that courtesy. We are currently rocking an availability of around 99.9% which rivals a decent number of VPS companies out there.