Apparently, lots of Cathedrals are unfinished, otherwise a tax had to be paid. Peterborough Cathedral lacks a pinnacle, reportedly for this reason.
Mosques are never perfect, deliberately.
The old, narrow A1, was dualled south of Peterborough, with two lanes each way. When asked why the bridges were for two lanes, rather than three to allow for further expansion, the answer was "That's not in the budget"
Only a few years later it became A1M with three lanes each way, so every bridge had to be demolished and rebuilt.
Carved into the stone lintel above the office block of my former employers (one of the British manufacturers still existing and expanding) is a quotation from the Book of Proverbs, "Where there is no vision, the people perish".
Which sums pretty nicely the forward thinking, or lack of it, that bedevils so many projects.
Howard