Hey @geof3 - I’ve researched and written on the subject of whole-house vs. point of use surge protectors.
TL;DR - Keep your point of use protectors even after getting a whole house unit, the main reason is the high (~ 600V) let-through voltages most whole house units have. Whole house makers and the NEC do not recommend substituting the whole house units for surge protectors for sensitive electronics, but in fact recommend you use both.
Whole house units are recommended in large part to protect things that can’t be protected otherwise like fire alarms, house automation, GFCI outlets, and major appliances but also the internal house wiring.
Living in South Carolina I have lost 1 laptop I left charging overnight without a surge strip.