In this case, the filter is getting installed on a L&G tractor with a hydrostatic drive.
I am pretty sure the hydrostat had never been touched in 30 years...and the OE inline filter is $80 and nearly obsolete. I had three choices: continue to run the 30 year old OE filter since there are no replacements; run a external filter head and oil filter (limited room), or try a Magnefine. I actually already had the external filter (from another application), but the Magnefine looked like a better alternative in this application.
Basically, anything is going to work better than what I have on the tractor now!