As a point of clarification, the Apple tech advised that any of the listed items could be causing the start up problem, not that that any particular one(s) were necessarily to blame.
Sorry if I caused undue alarm. Due alarm is, of course, ok.
Harv 27" i7 iMac (10.13.6), iPhone Xs Max (12.1)
Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
