Tantalum caps, they are a pain when they fail, why are they chosen over electrolytics in some test equipment?
I think that tants have a lower series resistance and inductance than the usual aluminium foil type electrolytics.
So you get more effective decoupling in a smaller physical package.
my head says 1uf is 1 uf no matter the cap, so why recommend a different value when replacing caps of different types?
Probably to compensate for the less effective decoupling due to the parasitic R and L.
Often it is more effective to put two smaller value capacitors rather than one big one.
Many years ago at a place where I worked, we had strange problems with some flow measurement computers*.
The problem was in the power supply board.
The maintenance philosphy was to just replace the board with a spare and send the faulty one back to the manufacturer for repair.
The boards would come back to us "No Fault Found", and would still cause problems when installed in one of the computers.
Eventually we ran out of working spares, so some real faultfinding was needed.
I found the problem to be excessive ripple on one of the supply lines, due to a dried up electrolytic.
So, put in the closest replacement we had, the ripple was much better but could be improved.
So I tried a second capacitor in parallel, much better, so try a capacitor which was twice the value.
That was OK but still not as good as the two in parallel.
I cannot remember the final solution to the problem, whether we got some better capacitors or just sent the whole load of iffy boards back to the manufacturers and said "Look here dumbo, the problem is this cap. Fix it!". I think that was about the time when I was moving on to other things.
* Not a computer with a processor, but something with lots of analogue and logic which calculated gas flow rates from differential pressure and density. There were a couple of umpteen bit frequency dividers which had to be set using a whole load of link plugs.
JimB