It wasn't under-investment, it was lack of focus. They spent their time running after new growth opportunities at the cost of their core business. They wanted t

It wasn't under-investment, it was lack of focus. They spent their time running after new growth opportunities at the cost of their core business. They wanted to do IoT (low power they're not particularly good at and the margins are awful), 5G (they had some success here) and autonomous driving (some success but still comparatively tiny). Meanwhile their core business started to fail.