I doubt As impressive a the Planet-Scale sounds like, monitoring system has been essential in a lot of companies, big or small, and there are tons of companies

I doubt As impressive a the Planet-Scale sounds like, monitoring system has been essential in a lot of companies, big or small, and there are tons of companies dedicated to this problem domain. So it is not an untapped territory for many. Google solved a problem that is relevant to Google and its scale. The solution is cool, but it is only so because the problem exists in the first place. Without Google's problem, the solution will be seen as incredibly over-engineered and unnecessary.