something like the following? https://update.bang-olufsen.com/ It doesn't list the older products.

No it was the older era of products from the 80's, 90's and early 2000's I tried to look at Beoworld via Archive.org and can see that it was not a Part of the Beotech section, but remember it as being a subpage of some kind on Beoworld. Not a forum post

Something like this thread maybe:  /forum/general-discussion-and-questions/the-unique-one-and-only-software-update-thread

Not that one either, although a great reference for certain products. no it was more of s comprehrnsive list with profuct names, type numbers, latest SW version, and it was everything from TV’s, music systems and Beolink converters, Beolinl Actives and Passives etc.

link one perhaps, at least it does has some BL Actives and passives? (Found it after first finding this which had a link). Sadly no mention of Beomaster ROMs, I guess the list dates from 00's or later (the comment says 2013) as the oldest products I could see were Beolab Penta, Beovision MXs and even a "8341140 MASTER CONTROL LINK 2AV 2020 2.3" still hanging in there.

link

This one perhaps, at least it does has some BL Actives and passives? (Found it after first finding this which had a link).

Yes that was the one I was thinking of. Thank you very much 😀 Look like it was on the archived forum, but in the form of a WIKI page instead of a forum post.

link

Sadly no mention of Beomaster ROMs, I guess the list dates from 00’s or later (the comment says 2013) as the oldest products I could see were Beolab Penta, Beovision MXs and even a “8341140 MASTER CONTROL LINK 2AV 2020 2.3” still hanging in there.

Yes not going back as far as I thought, but it may be a usefull foundation for an updated version. @Multicare is it possible that this WIKI list can somehow be integrated in the current Beoworld technical section so it's easier to find for future reference? In the best of all worlds it could be great with a list with all software revisions for each product with revision notes like those for the BM4500 update in this thread However unless official documents that explains the software update revisions can be found it can be hard to be sure what a software update does. I tried to make a revision list for the Beolab 3500 software versions in this post link based on forum post's stating what an update did. However some of the information seems to be conflicting with each other and with what I have tested so hard to make such a revision list without official documentation to back it up. Also there might be an issue documenting all subrevisions like the example in this thread where the sticker on the outside of the Beolink Active says 1.6, but the one on the chip says 1.64.    

Now going through the list many small things are showing up that gives food to thoughts. For example what is a Beolink Active type 1681, or a Beolink Converter to AV7000 BEO4 type 1612 (very specific product name by the way)? Probably small differences from the normal product line that served a purpose on a specific market, but very interesting to dive into.