... which is why you, me, OS and mutt like to see them come up from time to time. It's a case of not being significant on every takeoff .. but if the weight is low and the speed Vmc limited .. then a bit of understanding might just avoid Capt Bloggs' getting himself into more strife than he needs.
We Aussies were quite fortunate ... AN, in the olden days, had a pretty good approach to performance for pilots .. the early course notes, put together by folk such as John Walsh, Roger Gabriel, et al (actually, I've never met Al .. but I guess he is a fine chap) covered the certification considerations in considerable detail. Likewise TAA's (subsequently Australian and now Qantas domestic) Pete Turner, Qantas' Wal Stack (Wal's original pilot course - a moderately thick paper - is quite prized by most folk ... I have several copies for auction ...). Certainly, with the operators for whom I did the ops engineering stuff .. the boys got the full going over with certification ins and outs ... and I have no doubt that OS does the same for his current clients. A lot depends on the attitude and desires of the Chief Pilot ...
Unfortunately, the "must know" philosophies have cut the available time down to nothing and, often, the presentations are made by folk whose knowledge is adequate rather than extensive.
C'est la vie, I guess ...