Dear friend Surapon. With all due respect, there comes a time when we must recognize that our health and vitality is no longer that of decades ago.
I spent the night working with a video camera shoulder, and came home exhausted.
And not yet completed even 40 years of age.
In my opinion, makes sense to replace some top of the line equipment, with other more modern and light, even if it costs some loss of image quality. Even if I had the money, I would not use 1DX + 70-200 2.8 II + 600EX. Honestly, a set that weighs 30% less, would have much more use to me.
But, I would not be so radical as to replace my DSLR for a cell phone.
A good APS-C camera can do today, what only Canon 1D mark II could do a few years ago.