When you have the chance post your method here for those having the same issue. I think it will save a few strands of hair being ripped out Though the converter did a great job for a number of us there are still those like yourself getting frustrated with it not working for them.
Understanding what you are saying and feeling I have to agree with Morrigan. Even with a tick system you will still have those that will tick it in panic or expect tech support to jump for them at the drop of the hat. Then fold the proverbial page thinking it will be the shortest path from A to Z. Not everyone knows how to trouble shoot like those of us that have been around for some time. This method geared for those with less experience and patients while the rest get caught in the shuffle. As we can remember from the past with 3.0 the support tickets rose to a point where the tickets were gotten to much later than the intended 2 business days max. So I don't believe this automated system is really designed to be disrespectful but more of a sane method to weed out the easily fixed issues using the support tool leaving tech support the more in-depth issues.
I have used the converter both ways on a few of test sites on my local without issue. Both are working fine on my local. My live 3.4.8 site is also utf-8mb4 and it too is working as expected. Remember that the utf-8 is more of a common character standard as where utf-8mb4 is more complex for other applications.
Are you lookig to upgrade your live board or a test board? IPS will upgrade your licensed live board for free as far as the core and official apps you hold license to. Just go to your clients center and submit a ticket. Unfortunatly they will not be able to upgrade your 3rd party apps. These you will need to contact the app authors.
If I had the time I would, but you can go here https://community.invisionpower.com/third-party/providers and talk to these fine people. As for me I am in preparation to spend a week in a boat with nothing more than a fishing pole on my mind.
First Part Again - The framework IPS 4.0 is built on is not compatible with any part of the older 3.4.x or earlier structures. This has been stated a number of times in this topic as many other topics. Skin Themes, Mods, apps and hooks from the previous versions can not be used with 4.0's new frame work. All of these have to be rebuilt from the ground up using the new framework. 2nd Part Yes it is possible for the coder (understanding the 4.0 framework) to rewrite a hook compatible to IPS 4.0.
Even with this said, I'd find it hard to believe that many potential members / customers would stick around seeing a forum loaded with topics that have been closed. For me personally a forum like this would appear disorganized and out of control.
Hmmm, It appears that you are correct with 3.4.x. I suppose I was just automatically disabling it without really noticing it and actually I am glad to see this fixed in 4.0. Closing topics or posts should be a moderated feature set by Administration anyway. Can you imagine a forum filled with closed topics by members rather than staff?