I owned that Tamron 35-150 and took it on a trip to Scandinavia and the Baltics. It is a great lens, but I did have to change it to the Tamron 17-35 often to get wide enough for architecture shots, which was kind of a pain. I sold all my Sony Gear about a year ago and got the Canon R5 w24-105 f4. And I prefer that focal length for a one-and-done travel lens. I know they are coming out with the 24-105 f2.8 and I’m not sure I will get it because I never went below f4 on the Tamron lens.
I get its convenience, but I’m not too fond of variable aperture super zooms if I can avoid them, except for the Sony 200-600 and Canon RF100-500. I tried this lens, and I noticed a drop in sharpness and a considerable drop in performance in low light. The version III is a big jump in quality, though, and they are convenient. If I was on a very tight budget or starting out, they also are a great way to find out what focal length you use and what prime lens might be an excellent future investment.