Lynx and 3DO were too far ahead of their time for possible mass market success and seeing as that's 66% of the A1000 chipset team you can guess the rest.
I don't believe A1000 was too sophisticated at all, it was simply down to bad marketing or no marketing in the case of 1986 and the A1000 with Commodore.
BUT the reason it took until AFTER the ST for the A1000 to be finished was money, now if you said if someone with billions backed Jay and RJ and Dave fair enough, maybe then with some marketing savvy they would have survived.
Also, whilst you can argue that using PC components was inevitable (like all the 3D GPU cards in 486/Pentium era) there was no reason why you had to mate them to a $hitty PC bus like ISA or all the memory contention in the PC compatible architecture. Intelligent companies would have taken the Diamond stealth 64 chipset and mated it to a superfast bespoke Amiga architecture with 32 bits....couple with superior OS = much better performance for the same price.
I think for a real winner you would need Commodore (because they owned MOS Technologies...a massive strategic advantage in the right hands) and Tramiel still there (because he wasn't a dikhead like Gould/Ali combination so no time wasting crap like the +4 or C128 wasting R&D finances) and Amiga chipset. Tramiel at Atari had no money left to do anything, Commodore run by ****s who wasted 3 years making the butt ugly same technology as before A500 was also fail and Jay on his own had no money to develop jack $hit
YMMV
PS PC was NOT a done deal at all, home and business market place were big enough separate market sectors to make billions in one not both. We only got PC for home use because Acorn/Atari/Commodore ALL tanked around the same time. Apple was overpriced crap but their huge profit margins selling to t-w-a-t-s with no brains in the 90s saw them through until the cash iCow bollox came along to rescue them. Even today Mac doesn't even make 5% of world computer market FAIL. They only stayed commercial with iBollox sorry. Ditto for Nintendo...only Pokemon saved Nintendo in the N64 years while Sony was tearing Nintendo a new one on a regular basis for TWO console generations.
Moral of the story....cover your turds in gold dust and you will survive even if you are selling turds.