I just sent in cancellations for two triathlons that I've done for the past several years: Columbia (Olympic distance) and Eagleman Aqua Velo (half iron distance).
They fall right in the midst of our house renovation schedule and I won't be able to be well-prepared for them. I don't want to go and just slog around the course slower than I have previously - I'd rather wait until next year when I can be well-prepared and return to them with focus rather than as an afterthought.
On the other hand, cutting out a tentative spring break trip will allow me to run a new local half marathon in Cambridge, most likely.
One door shuts, another opens.