[Info-vax] The real problem that needs solving to grow VMS

Arne Vajhøj arne at vajhoej.dk
Wed Nov 2 20:31:48 EDT 2022


On 11/2/2022 9:13 AM, Simon Clubley wrote:
> On 2022-11-01, Dave Froble <davef at tsoft-inc.com> wrote:
>> Why is VMS still around?  Because in some instances, it runs the best tool for
>> the job.
> 
> No. It's still around because there's an installed base.
> 
> There are still PDP-11 systems around for the same reason.
> 
> That doesn't mean you are going to put a PDP-11 system into a new site.

Short term there is a difference and there are sort of
3 levels:
* will keep existing system and will use for new systems
* will not use for new systems because better alternatives exist, but 
will not migrate existing systems because migration cost and risks 
outweigh the benefits
* will migrate existing systems

And usually a lot fall in the middle category.

But long term the middle category shrinks. For whatever
reason (like HW becoming unavailable), then something has
to change and then the migration happens.

Arne





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