I've never smelled tobacco in my cellar. All bulks are stored in Mason jars. I noted that a member mentioned that ODF tins corroded, as it mine, I believe from the vinegar? MB uses with the tobaccos they steam-press. Their latakia flake has also been treated with vinegar, and I plan to jar both of these blends immediately if I'm not going to smoke them right away. In any case, I smoke two many blends at one time to smoke a tin reliably within a month's time, the maximum recommended time to keep tobacco in a tin that has been opened.
I'm not good with checking cellared tins for breach nor retightening the lids on jars; in fact in 14 years I've only done it once, but I've yet to pull a jar or a tin from the cellar and find the tobacco degraded. At times the closed jars in the cellar "ping" as the pressure waxes and wanes. Though I only screw the ring down tight when I jar, that is not heal-sealing or sealing with paraffin, as much force as my hands have seems to gird them sufficiently for an indeterminate number of years.