Duration of non supported applications

[Signe Marie Sanne]

Hello to the list

After having used MetaCard since 1989 I'm now retiring from my job  
and there is no one to follow up my work.  Both I and the institute  
are worried about further usage of the educational programs I have  
developed for various foreign languages at our University. Many of  
the programs are purely textual, whereas some make use of QuickTime  
(only on Mac) and Microsoft Multimedia Tools for sound and graphic  
files.

So far I have used MetaCard and engine 2.6.6. The programs make use  
of a portal stack (thanks to Sivakatirswami) which downloads/opens  
the various educational programs. This downloading is done by http.

My questions to the group:
If the institute and the students are happy with the programs as  
they  are with no urgent need to change anything,  for how many years  
can we count on their functioning? 5? 10?

Should I convert them all to latest version of Revolution? Would this  
secure a longer life for them?

Can we  count on a contiuous existence of QuickTime and Microsoft  
Multimedia Tools when new systems arrive?

I would be happy to hear your opions.

Signe Marie Sanne