Many solicitors would have a checklist of points for discussion and decison before proceeding to a draft. I have found this a better approach than just adopting some draft.
With the advent of the word processor drafts of alll sorts of agreements have got longer and more prolix - a glaring example is the set of rent review clauses in a standard commercial lease, with attached schedules, exceptions, reservations etc ad nauseum.
Hence the "elephant and kangaroo" clause. The urban legend is that a clause in a commercial lease against these animals grazing in the carpark went thru some eminent firms without being spotted.
Back in the days of typewriter documments were more tightly drafted,