Yep, even the fact that NickServ has to send thousands of notices asking all users to reidentify, then Guesting all nicks that don't comply, whilst accepting identification from other users in itself could cause another crash. Webmaster's has changed CR to embed Services in the IRCd itself which effectively makes Services crashes a thing of the past, though I don't know how new this idea is. If it turns out to be reliable it might be something that other IRCd coders might want to consider.