I tend to lose or break ear buds. Most of the breaks come from the cable being yanked, and the failure occurs near the 3.5mm plug - so a MagSafe style breakaway adaptor would be preferable for me.
My headphones can break, again near the 3.5mm plug. I have even looked into buying or making a short 3.5m Male to Female adaptor, with the male bit being L shaped. This would reduce the mechanical load in the cable. So yeah, I wanted a dongle even before a dongle is necessary! Sometimes I have been known to apply some Sugru or SikaFlex to the cables of new earphones if their cable gland doesn't look up to the job. Some Sennheisers had replaceable cables, but the replacements weren't cheap, and the current models seem to have abandoned this.
In time, this fuss will die down. Adaptors for older headphones will be dirt cheap (and in the process protect the cables of the headphones from mechanical strain). The advantages of having the DAC chosen and tuned for specific headphones will improve sound quality (or make the same sound quality cheaper to achieve), and noise cancelling headphones will be cheaper and easier to use (because they won't contain a battery that needs charging).