I thought it was worth watching ...... although he was a bit uncoordinated

I believe it is necessary to have someone like him who lays down the line of demarcation ..... crossing over that line means not complying with the free software 'way'.
At least there is no ambiguity ...... we can all know where that line is.
With that certain knowledge we can, each of us, make our own decisions whether to try to adhere to the free software philosophy or not.
From a personal point of view, I appreciate having that line drawn.
At least I am aware that I am crossing the line when I use some software ...... even though it might be open source ..... and am able to make a more informed decision about what I use and why.
Yes I agree he is a 'hard-liner' ..... he does not accept any crossing of that line.
I fear what will happen when he is no more ....... who will keep that line visible to those who come after?
We could easily lose the whole philosophy of free software and eventually drift back to quasi-proprietary software put forward as open.
In my daily use I take a practical stance on what I use ... practical for me.
I do so in the knowledge that it would be so much better for me (and everyone else too) if I could do my daily stuff using ONLY free software.
Without Stallman continuing to speak at such gatherings, I could easily lose my awareness of my failing to adhere to the free software philosophy.
That would, IMO, be a tragedy.
We should always have an IDEAL goal ....... and RS shows us what that ideal should be in relation to software.
If one can put aside his oddities and other negatives one might feel, and listen only to his message, I think we can gain a lot from him.
... IMO, of course
