BOINC is great. In its day, you could get an enormous amount of computing power on a shoestring budget thanks to volunteers. It also helped the volunteers feel like they were more a part of something, because they were! I used to have a small server farm crunching numbers for science.

Unfortunately, the landscape has changed. Some projects are still around, but many of the big players have left. Computing power is a lot more accessible now, and the main limitation is time spent analyzing the data rather than the computation itself. Cloud computing can make just about any computation happen fast for a reasonable price without having to own all of that hardware. GPUs have exploded in computation capacity. Just, a lot of factors came together where the need isn’t as great.

With that said, I still run it on one mini PC, but the payoff for having to write your application in a distributed fashion doesn’t have the return on investment that it used to.