Jeez, just relax. If you don't want other people's opinions, don't use a public forum. This forum is not your playground where you set your own rules. When you open a thread, all kinds of people are going to give various opinions, and that's actually what makes it interesting and fruitful. If you're not interested in one opinion, you can just ignore it. And again *I* did not revive this thread, it got active again, and I reacted to it (was not even on the forum when it first started.) It's every user's right, as long as they are not insulting anyone. I don't think I did. But you did with your "stupid" words.
Threads in a public forum are not just a private discussion. If you wanted it to be private, just use private messages. Many other people looking for a similar solution can be interested in reading various options and opinions. Without counter-arguments, some people after reading it may conclude that using HV opamps is stupid whatever the context - which is obviously silly. Threads are shared discussions, not just a private and free tech support tool.
As to the time it took, I don't doubt (or care, it's your business) you had many other things to do, but it just shows designing a discrete version was definitely not as simple as it first looked, so considering other options was definitely not stupid engineering-wise. So I consider my point (which was short enough not to require hours to read) to be relevant. Again, take it or leave it, but it could help others deciding what's the best option for their own project.