I do not agree, with an old Intel Core i5-2500K and 16 GB of memory I noticed a preformance improvement in latest release restoring a quite normal behavoiur even on this outdate hardware configuration. Lags are not completely eliminated, but In my op...
Exactly same problem with Thunderbird in Supernova version (expecially in latest release), slowliness everywere.....and not in selecting and deleting or moving tons of email, but simply openig emails just received...I'm a Thunderbird user since first...