Based on a thread in the german Forums called "Elder Scrolls Portal": https://www.elderscrollsportal.de/themen/siegel-der-bestrebungen-ein-kleiner-rueckblick.55885/

The Endeavor system has now been available long enough that as of today, if you've made every daily ab weekly you can now buy a Radiant Apex Mount through Seals, rather than through the manipulative gamble that Crown Crates represent. So you can have collected a little more than 16,000 seals to date.

So it took 222 days. And here, too, one notices the typical "Zenimax factor", because once again the developer didn't think much about it or simply thought wrongly about it. Because if you wanted a mount that was available during the seals launch period, you can't buy it today, as it's currently not in the store. Because, in addition to the well-known gambling mechanics of the crown-crates, Zenimax also uses the so-called "fear of missing out" principle, far removed from any sense of respect for the time and money of the players. So boosting item sales due to their limited availability, which of course is absolutely ridiculous to justify in a digital store.

From the beginning there was a rumor that this system was only introduced to counteract the gambling regulations of some countries in advance. But maybe it's simply a reaction to the criticism from players due to the expensive prices of loot boxes. One way or another so it's a typical Zenimax thing: the solution to a problem the developer created himself.(Hello to the craft bag!)

Now let's get to a few
Statistics:

I said radiant apex mount and that actually makes sense. The other currency is the gems (how fitting that the premium currency in the free-to-play, lootbox-infused mobile offshoot of the series is named the same) and here there are sometimes drastic conversion factors. We have to pay 16 gems or 1000 seals for a superior item. That is a factor of 62.5. For a Radiant Apex Mount, it's 2500 Gems or 16,000 Seals a factor of 6.4.

Also interesting is the fact that since the seals were introduced, the amount of seals that we can get every day has dropped drastically. In the beginning we could sometimes earn up to 90 seals a day or 400 a week. But that still seemed a bit too generous, which is why it quickly dropped to an average of 70 seals per day (= 3x 35) and it is currently at 35 seals per day (3x 10 seals).

If you start collecting seals today, you will need at least 250 days instead of 222 at the current factor. And of course you can't explicitly save on an item if it's too expensive, because the FOMO kicks in really well here too.

My conclusion:

As I suspected at the outset, the Endeavor system is not a real alternative to gambling. It is not possible to see an item in a store and actively save for it. Unless you wait until the rotation of the loot boxes has changed again. The aspiration system merely serves as an additional element during the gameplay-loop. It marginally changes the way the player plays in the way that they look at which of the aspirations they are comfortable doing and then complete them. But actively working towards an object is not worth it.