Bruce will be 70 next year and has been steeped in traditional photography for more than half of those years. I would place more emphasis on his knowledge of that process, and less on what he has yet to learn about digital.
However, among those who have been at this for decades and derive their livelihood from photography, I have heard the same concerns addressed in the article. In particular, the immense cost of constant upgrades and the future accessibility to past imagery.
These are not necessarily concerns of the dilettante, but paramount to many serious workers in the medium.
Bruce has had his share of detractors, but I would not dismiss his message; there is some truth within.