The OP was using a mouse to scroll;
the "End" key goes instantaneously to the end,
thus offering a huge improvement to the OP, if he so desires.
For every person who wants something,
someone else can be found who would be upset
by not leaving the focus where it is
(see what I describe below for why that matters to me)
so it's pretty hard to find any one thing to satisfy everyone.
Why don't I add my own related peeve:
In my favorite email program, if I scroll through viewing
successive messages, the "selection" in my mailbox list
moves along accordingly to the next message,
so that whenever I close my message viewing window,
I know exactly where I am in my mailbox.
In TB, the selection stays exactly where it was,
giving me no help in seeing what message I just closed.
The "stars" initially shown on brand new messages
last only until I open one single message for reading,
so those are almost completely useless.
"Read" status is good for one pass only,
and then only if I am always reading strictly sequentially;
on subsequent re-readings, there is no way left
to "keep my place" in my mailbox.
Excellent design by very insightful architects
is something that stands out when encountered,
just as does its opposite.
--