Are you suggesting baseball should never evolve? If so today's game would look very different than it did hundreds of years ago.
After all catchers didn't use gloves for many many years. So why use them? (pic from a catcher who played from 1871 to 1883)
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I happen to know quite a few professionals myself in a variety of fields and although some of them did get issued iPads, they are mostly viewed as a perk of employment and not seriously used for work.
How they see the iPad is their choice. Some good professionals see smartphones as useless toys. Some still see computers as weird. You can be a professional in many fields with or without an iPad.
In other words, they'll answer a few emails on the iPad and then watch a movie and play a game on the plane.
But that's how they use it, that's their choice and their unwillingness to put the time to understand how a new tool can fit a workflow. A tool is a tool and it has to be learned and implemented.
Any serious work that needs to be done they still use a laptop.
It depends on how you define serious. If by serious you mean high-tech stuff, maybe. Or if you mean working on a complex Excel Spreadsheet using VBA and automation, maybe. But for a real pro one thing is important: time. What I have seen - and this is my experience - is that once the iPad pro is integrated in the workflow there is a huge reduction of time. It's all boom, boom, boom. Get the spreadsheet boom, put notes, boom, email it boom, open the meeting minutes in PDF Expert boom, write notes on it with pencil boom, open Noteability write on it boom, pdf a piece of paper they gave you boom, keep it and write notes on it with pencil boom, create a very quick nice to see presentation
during a small meeting and let everyone in the room see it through the iPad screen seamesly boom, go to city manager show budget graphs boom, check latest survey boom re send it with handwritten notes boom. All with one tool. Can you use a laptop to do the same things? Mostly yes. Does it save you time? No. Do you carry it around ALWAYS? No.
Plus I have observed (and this is niche) the ultimate miracle in Public Admin: reduction of paper!!!!!