The last few posts, very real and my condolences as well.
GA is the toughest flying we will ever do, single pilot, complex aircraft, none of the whizz bang tools of the modern aircraft. Ok some have retrofitted upgrades.
Still in my eyes, always has been that it is this flying that stays with you forever.
The true cause as stated will probably never be known, but as has been well and truly said, no one goes out looking for this to happen. The Swiss cheese lined up.
RIP fellow aviator.