Solder is less likely to crack from thermal expansion as it;s expansion is close to that of Cu or Al.
Also solder is structurally MUCH stronger than epoxy even the decent metal epoxies. I say this as I had epoxied barbs on my block - 2500psi bond on the epoxy and I snapped one off with a bit of rough handling. In comparision the soldered joints on the block survived it being dropped on the floor and the afrementioned rough handling. My barbs are now soldered
And finally solder is quicker - the thing is done and dusted in an hour tops, epoxy you have to leave for 24 hours to cure.