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I was thinking about it, you know... Not so long ago had at home Cannondale Six13 with an alloy/carbon frame. It was nice looking and very light but there was some "bubbling" on the joints, like oxidated aluminium under the paint. I didn't want to risk it, as I weigh 95kg, so I kept the Shimano DA groupset and sold the rest.
I have to say that this Alan frame condition seems to be much better than my Six13, but I wonder how it looks in up-to-date pictures.
Bi_Polar_Bear-
It would probably be fine but when in doubt best to not take the chances.
Those bubling seems quite normal as seen a lot on fork crowns where the carbon blades attaches to alu. Have assessed and used a few myself with no issues.
That's my observations and I am not an engineer AND I weigh a measly 65kg.
coventry_eagle
I've seen an Alan track frameset in person, rare as as hen's teeth as most have unbounded or cracked.
Nice conversation piece but wouldn't want to ride one.