There are several things to consider. Articles as such have mostly attracted low reputation users with no or low credibility and plenty of Articles have been AI generated or otherwise plagiarized. Some have also been merely reposts of author's blog posts with links to original which makes them look more like spam than attempts to share knowledge.
Another issue is that one of the best things about current Q/A format is ability to have multiple answers on the same question (problem) and the best answer can rise to the top. This also concentrates knowledge around particular problem to a single place instead of having it scattered around.
Currently the greatest issue with Q/A part is that you need to ask a well formed question which aligns with our rules (should be focused and not opinion based) in order to write the answer and share the knowledge. Articles may offer some possibility to broaden what is acceptable without having negative impact on Q/A as current rules for asking questions would not change.
To me the best option would be having suggested topics of interest (similarly to how users could suggest topics for the Documentation experiment) and then knowledgeable users would be able to provide answers (articles) based on those. Or user who wants to write about something could do that immediately without having to cover any of the suggested (requested) topics.
The problem itself could be presented in a sentence or two and would not bring any reputation and then multiple users should be able to write full answers (articles) on the same page (similarly to current Q/A) based on proposed topic and reputation would be rewarded to those, unless OP makes it Community Wiki.