If you head to the architecture guide index page, the box "Column Storage" is not clickable while "Row Storage" is. We should remove the "Column Storage" box and change "Row Storage" to "Row/Column Storage" as row store and column store are now described on the same page.

As part of this ticket, it would be great to add the missing line in the architecture guide index (reported in WT-8213 but we can use this ticket to fix it).