Yes, the level of professionalism continues to rise, as competition gets tighter and tighter. The idea that some sea change happened in 2010 is total revisionism backed up with anecdotes. "Teams" didn't have coaches and trainers? What teams? Certainly the big teams all have had them since the 90s at least and even in the 80s. Some riders had their own coaches. Some teams had full staffs of both, some had coaches who worked with the riders. It's been evolving, it wasn't some revolution. Just like every other aspect of performance. Bikes, nutrition, budgets, etc.
Tell USPS, ONCE, Banesto, Rabobank, etc. they didn't have trainers, doctors, and coaching staff. And plenty more.