I see a bunch of threads about various bugs in Mautic 5 that make it challenging to use for production. I’ve got v4 installed and have been learning the ropes, but I wonder if I should upgrade to v5 before I start using it for real. What do think?
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Depends on your set-up and needs.
If you need to upgrade to a maintained PHP version, M5 is a must.
If you use Amazon SES or any other ESP and need bounce management via callbacks, M4 might still be a must. That is until the plugins are ready (some are) and battle tested.
Other than that: There are bugs for M4, too. So, there’s that 
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I agree with OP: I tried to update from a production system running Mautic 4 to a test system Mautic 5 using the documentation. There were a lot of issues and I still have not a working system. I also got the feeling that the software misses a lot of QA or assumes that everyone starts from scratch with Mautic 5.
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Here we are in March 2025. What is updated answer to the OP’s question? How much progress has been made? I installed 5.2.1 and then upgraded to 5.2.2.
I continue to experience instability with the backend and bugs here and there with the email editor.
Does anyone out there have a fully functional and bugless Mautic 5.x?
Following a discussion I had with @rcheesley I understand that Mautic 4.x is no longer being supported with security updates which renders the system “insecure” as there are a number of exploits that have been released, so I guess Mautic 5 should be operational however I have yet to put it into production for my instances.
I do have a fully operational version of Mautic 5 that I am testing out and playing with, the whole email configuration and working is totally different from 4 and the documentation i have found so far is “okay” but not covering all the topics. I hope to add to this as i move forward.
interested in hearing some other expereinces here as well.
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