I should add to what Jamie has said. Sometimes a topic is locked without a final word from a moderator because the moderator has already said something earlier in the thread. Occasionally, a topic is locked and a mod forgets to post the reason. The reason is usually pretty obvious, but not always. Other times, a topic is locked temporarily while the mod gets feedback from other mods.
If you want to know why a topic was locked with no warning and no comment, please, PLEASE send a message to a moderator or administrator, and include a link to the thread so that he or she can look into it. We do make mistakes and oversights, and we can't do our jobs effectively without regular feedback from the people on this site. We get complaints for not acting quickly enough or for not moderating someone harshly enough, and we get complaints for being swaggering, overbearing, tin-plated dictators with delusions of godhood (okay, I stole that from Star Trek). Here's the rub: we sometimes get both types of complaints from different people about exactly the same action. The truth is likely somewhere in between, but different people have different ideas about how things should be. Susan is the final arbiter, as this is her site.
I'm sorry that you won't be around, Skye, but it sounds like you have good news about HRT. Be well, and drop us a line every once in a while.