This whole post seems about right to me. Berkshire's batting average in large acquisitions has gone down, even if nothing has been as bad as Dexter Shoe (the Precision Castparts acquisition in particular seems to gone terribly, although as a PCP shareholder at the time it bailed me out), showing the importance of BHE; if there's nothing tempting in the market, they always have the backup option of bunting for a single by building more solar/wind at reasonable, predictable returns, and while I think Pilot is a perfectly fine business . Between that and tuck-ins at Lubrizol, MiTek, etc., they have consistent options.
It really shows the franchise value of Constellation Software, though, in their ability to swallow all sorts of plankton-scale companies at a rate meaningful at what's now a $70 billion company (in addition to their recent pivot to buying large companies from forced sellers).