It's probably an old wives tale...that you shouldn't change really old
ATF.

I would definitely change the fluid if you want to keep the car as
long as possible.  It is SO easy to change the fluid in a '95
Camry...all you have to do is remove the drain bolt, let old atf
drain, replace the bolt and then add three quarts Dexron III ATF
through the dipstick.  I wouldn't bother with dropping the pan to
replace the strainer (filter).

Also, you may want to change the fluid several times using the drain
and fill method that I described above since you only drain about 40%
of the fluid (the 3 quarts) each time you drain.

I drain out my trans at the plug every maybe 20000m and have dropped
the pan twice for a full fill. Once at 10f it did not shift, I had the
pan dropped and that fixed the issue. I use Mobil synthetic trans
fluid. Everytime I drain and fill with mobil synthetic it shifts much
much better, it actualy then down shifts, I notice mpg and power
increase which seems to last for 10000m. I noticed a small difference
using Mobil synthetic in the differential. The synthetics dont get as
thick in cold weather which helps. The motor I change at 5000m with
5-30 mobil 1 and notice a big difference on new 5-30 oil. One thing
you should do and its only maybe 15$ is have the timing checked, a
stretched belt on my car made the car loose power and mpg, apx 4mpg.
It was about 4 degress retarded. Change everything and check timing
you could easily notice 3-7 mpg more. Synthetic doesnt get as thick
when cold , Mobil has friction reducers that work but wear out after
3- 6000m. I noticed a big difference in power every time I change
fluids. Change the trans and filter it will help.

I don't think you'll find any scientific study on the effects of
replacing old ATF and its correlation to tranny failures. But I know
the first thing suggested in many diagnostics procedures on tranny
trouble tends to be replace the ATF.

Power flushing a dirty tranny is asking for trouble. The loose clutch
material can get lodged in valve bodies. However, one thing is
certain: the clutch material in the fluid acts as an abrasive and it
will cause accelerated wear in a vicious cycle : the more particles in
there the quicker it wears.

I'd drop the pan, change out the strainer and drain-refill. If you
must, drain and refill three times in short intervals (drive a short
distance in between) after the strainer change.

GM-Dexron III replaced Dexron II. Just don't use the new Dexron IV or
VI (can't remember which), it's for the new GM transmissions.