Welcome to the forum.
In the early to mid 1990s S&W introduced new 3rd generation pistols so often it was and still is referred to sarcastically as the new gun a week period. Many of those including your 4546 sold poorly and are now collectors items. We are unable to learn how many 4546s were manufactured but a member who has been collecting their serial numbers for many years estimates 600. Police departments were the main customers for DAO 3rd generation pistols and they strongly preferred the ¾" shorter 4586 which sold very well. At least that's my theory of why the 4546 failed in the market place. Any how you are in a good position to trade for some sort of 1911 if you use the classifieds here as they are frequented by S&W collectors.
By the way, although the 3rd generation trigger is different feeling than most other brands' DAOs it is manageable if you work it like it was the last half of a revolver DA pull. Center the first joint of your finger on the middle of trigger for leverage. A traditional crisp SA is easier to use in matches but you might learn to like your 4546 after you master its trigger.