I would read/reply offline using OLX (Offline Express, a QWK reader also part of the Qmodem suite), and then batch upload my replies (.REPs, also compressed) to the BBS.
This was back in the day when you weren't connected 24/7, and when dial-up wasn’t unlimited (in my country — even if it was, BBSes were node limited so you couldn’t stay connected forever). So participating in BBS conferences meant quick dial-ins and uploads, where most of the messaging/replies was done offline.
Although bandwidth is abundant these days, I still think the QWK/REP idea is an attractive one. There is an art and a beauty to crafting replies offline from the cozy Turbo Vision UI that was OLX.