[sdiy] newbie alert - transistor question

[groovyshaman]

Hopefully this isn't too brutal of a common knowledge question!

Ok, I'm in the process of ordering some 2N2222A transistors for a few
projects I working on (one of them is a Blacet dark star - finally).  And
so I have come upon a strange question: is there any advantage to buying
them in TO-18 cans over TO-92 plastic?  Why do they still make cans?
Should I even be concerned with this?  I've been reading lies.. err..
datasheets, googling, etc. but other than the cans handling slightly
higher junction temps, I just don't see the benefit in spending 30 bucks
more for 100 pieces O' TO-18.  (Besides, if they're anywhere near 150C
I've likely got a much bigger problem!)  I appreciate any thoughts,
strange or otherwise! :)

PS: I've lurked (mostly) on this list now for over three years and it
continues to amaze me how much knowledge there is here, and how much I
have to learn.  Most of this knowledge comes from rubber-meets-the-road
practical experience which is nearly impossible to find elsewhere, and it
is invaluable.  When you share your experiences, it is greatly
appreciated!  Most of my experience to this point is building kits (MOTM,
Oakley, etc.), a simple FET preamp (for hooking a cello to my modular),
and a 76477 noisemaker I built 20 years ago.  Although I am totally self
taught in this field (a software engineer by trade), a crazy long term
goal I have is that at some point I can design and build a few interesting
synth modules and share them on this list.  I plan to actually go though
the process, screw up, and learn.  I think this is the only way to do it.
I just hope you all won't mind if I ask for assistance (or an oddball
question) from time to time.

Cheers,
George