Rated lifespan on that bulb is fairly short: 150/150 hours (high/low beam) at 13.2v. That's from the one and only Osram catalog I have that lists it, dated 2002; the lifespan and lumen ratings were removed from the subsequent catalogs, though the existence of the bulb was still catalogged. It's an excellent all-around performer, but its effective lifespan is definitely at the short end of "reasonable", and is closely grouped with the highest-performing 60/55w bulbs (Philips Xtreme Power and Xtreme Vision, Osram Night Breaker/Plus). The Osram 85/80w bulb is beyond the line in the sand I would draw past which the lifespan can't be considered reasonable.
The Osram 70/65w bulb reminds me of the little-known Philips 12639 "Turbo" 60/55w bulb of the late 1990s. It had red rather than black/gray blacktop and performance characteristics similar to the Osram 70/65w bulb. Lifespan was similarly short, too. Looks as if Philips has recycled the 12639 number for a blue H4 being sold in the Asian-Pacific Islands markets under the "Diamaster" brand. Another bulb that comes to mind is the Philips 12549, which was a nominal 80/70w item. I only saw these in "gold" (dichroic yellow), part number 12549GO. Never in clear. That number, too, appears to have been repurposed for a different H4 now.
Looks as if Flosser has an 80/70w H4, but I'm not sure what the output, actual power, and lifespan might be.