Hard to tell what the DT and Beltline population would be today but I would bet easily over 50K.
Here's the changes individually for each core neighborhood from 2016 to 2021. Interestingly enough EV and Downtown CC actually lost people, but the others especially the Beltline had solid growth.
Beltline 21958 - 25880 (16985)
Downtown Commercial Core 8758 - 8225 (4925)
Downtown West 2344 - 2825 (1625)
Downtown EV 3242 - 3140 (2110)
Chinatown 2104 - 2250 (1145)
Eau Claire 1666 - 1875 (1135)
38,663 in 2016 to 46,763 and a total of 36,170 residential units in 2021, which works out to roughly 1.3 people per unit.
I can't think of any new buildings for Chinatown or Eau Claire since 2021, but there are a few for the other neighborhoods,
EV
- Arris 3rd and 5th west tower (337 units)
Core
- Sierra Place (108 units)
- Cornerstone (112 units)
Downtown West End
- West Village towers (554 units)
Beltline
- BLVD (650 units)
- Nude (177 units)
- Park Central (462)
- Hat @ 14th (239 units)
- Oliver East tower (405 units)
- UPTEN (277 units)
- West Tenth 1400 (106 units)
11th + 11th (369 units)
......and going by the addition of 3,796 units and a rough estimate1.3 people per unit, we get 4,935 people, a conservative estimate which puts us well over 50K
I say conservative estimate because the greater downtown grew by 8,100 people from 2016 to 2021 with less development. The true population is probably closer to
@UrbanWarrior prediction of 54K.
A couple of things to note. Not all of those buildings are full, and conversely I didn't add buildings that were opening up around census time Redstone (137) or Telus Sky ( 326) 935 5th (66 units) also I didn't add Oliver II and its 461 units as it's only recently opened. Another factor would be how many people may have taken on roommates in this time of increased rent prices. I don't know anyone personally who has but have seen it mentioned a lot on social media.