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> That's fine.  But that's not how most journals work right now, as far as
> I know, and we are talking about how it works now.  If, five or ten
> years from now, paper journals are no longer the standard, then the
> limitations won't exist.  As long as they do, however, they do.
>
> billo
>

This is true, however it is not uncommon to see 40-60 pages
supplementary data in Science or Nature papers nowadays. Furthermore,
as Larry pointed out, nothing keeps you today from hosting your 140
pages pdf by yourself (your university, your lab...) and link to it in
your article, as a web link only takes half a line in a paper !