Well said Steve.
Let me ask this question: If a boat such as a newer Nordhavn was to suffer a lightning strike taking out the electronics beyond repair at sea, can the engines be ran manually? Can the boat be piloted to safety with some bypassing?
This issue is relevant for any modern vessel with electronically-controlled diesels; lightning is unpredictable, anyone who says he or she can predict what it will do, or prevent a strike is, well, not credible in my opinion. Stats for trawler/motor-yacht strikes are about 1.5/1000, that's pretty good odds, while multi-hulls are a whopping 6.9/1000, the highest strike likelihood of any vessel type.
It's a valid concern, but the odds of a strike are, one again low for this vessel type.
Nordhavns and others have been struck by lightning, suffering some damage but not to engines, while others have been struck and left dead in the water. This has much less to do with complex vessels and more to do with modern diesel engines, which are a fact of life for every vessel that's been built in the last 20 years, with an engine over 100hp.
If disabled by a strike, most electronically controlled diesels are DOA, there is no 'manual' mode. Some cruisers do carry a spare ECU, but that's not as easy to do as it sounds, it's not a simple case of taking it out of a box and swapping out the dead unit, they need to be programmed in advance by a dealer.
With some exceptions, most Nordhavns up to about 76 feet use primary manual, non-electronic/electric hydraulic steering (even most larger ones with full AC powered electro-hyd steering have a full manual mode), so you may find yourself hand steering in the event of a lightning strike if APs are taken out, so you could steer, but it would be a workout, because these vessels are very difficult to steer manually. Broadly speaking, most larger Nordhavn owners steer much of the time using the AP in nav or power steer mode (I recently completed construction on a N68 that has full electro-hydraulic steering for this reason, the owner wanted to be able to steer with the wheel, there's that pesky complexity vs. convenience thing again). Nodhavns in the size range you are looking at, I think you said 60, have provisions for manual steering using a manual tiller, but it's unlikely you'd need to use the emergency tiller as a result of a lightning strike, as the manual hydraulics would still work.
What Nordhavns do well is bonding and grounding, while it's not fully ABYC complaint for lightning protection (almost no power vessel is, however, most N's do meet ABYC E2 Cathodic Bonding Systems), it has a very solid bonding system, compliant ground plate and air terminal. In my experience, vessels with robust bonding systems suffer
less damage when struck by lightning. More on the subject here
https://www.proboat.com/2016/04/3530/