There is some concern that adding the images might lead to mis-informatian, if not done very carefully.
The wiki and its main page is for FPC an d Lazarus. The current list of OS, is a subset of what Fpc supports. It could mislead the new visitor into thinking that this is the full list of supported OS. (Rather than a sublist of OS, for which there happens to be extra info pages).
Also images are an attention grabber and that is a good thing, but it may take attention of any other info on that page.
Not all info on that page is necessarily worth the attention it has now (or even worthy of the main page).
But that needs to be considered.
I have never found the information I needed from the current home page which is not surprising given that it had not been significantly updated for 10 years! The most recent updates (2019, 2020) to remove outdated information were only achieved by my agitating and both you and Jonas responding for which I thank you and him.
I agree that addressing the split personality of the page is an issue. May I suggest that the page should be split into two columns with the left column (alphabetically determined) being for Free Pascal and the right column for Lazarus. This would then help to alleviate any worries than people may have about Lazarus information misleading anyone about Free Pascal.
There may also be an issue with
https://wiki.lazarus.freepascal.org/Main_Page proclaiming the wiki to be the "Lazarus Wiki" and
https://wiki.freepascal.org/Main_Page proclaiming the wiki to be the Free Pascal wiki. I have no idea how to solve that issue. It looks like it may have been intended that there were two distinct wikis or wiki namespaces although they currently both map to the same pages.
I agree that some of the info on the page does not appear to justify its existence. I would suggest that some of it (eg downloads, mailing lists etc) could be moved to the nav panel at the left in a similar way to to this forum again with Free Pascal and Lazarus separated.
I believe the fact remains that the portals are very useful thematic collections of information which make it very easy for people to access the information which is otherwise buried and scattered throughout the wiki. While I had no help from the main page, when I eventually discovered the existence of the Mac Portal via Google, I was so impressed with the concept that I greatly expanded its content by both adding existing pages, which were often even uncategorised, and created new content. I went on to create the Embedded, FreeBSD and WinCE portals.
If it would be helpful, I am happy to put in the effort to prototype the page on the wiki, although I get the feeling that the page is so sensitive and I am so "out of the loop" as regards that sensitivity that I might just be wasting time I could otherwise spend continuing to translate Mathias' AVR programming pages for the Embedded Portal from the original German.