Some years ago, the other train magazine did a "building a layout" article. The premise was the same layout configuration using all the available track systems, comparing the MSRP of each track system. Tubular 027 was the least expensive, followed by O gauge tubular.
That said, every track system has its' advantages and disadvantages. I'm surprised when I look at YouTube layout videos, how many people are using FasTrack. Obviously it is popular despite some documented problems with conductivity and fragile switch stands.
I suppose when one is debating a track system to use, you have to consider the type of layout you want to build, the appearance, and the types of engines/rolling stock you are going to be operating. Initial cost savings are only good if you don't have to go back and say, rip up switch tracks.
For myself, I have always used 027 track and will continue to do so. I don't have unlimited space for layouts, so the tight radius is good. But then it does limit what I can operate on the layout. But for me, this is not a big issue. Although there have been posts about the modern MPC-era designed switch tracks, I have NO problem with them. BUT I am also using the manual ones. Despite the somewhat ugly design of the switch box housing (which I change), the throw lever design allows easy automatic operation using nylon fishing line, run though a small hole I drill into the throw handle.
I have also gone to the trouble to take these same switches and chop them down to just the size template of the track itself. The postwar Lionel 1024 makes this task even easier as only the handle/indicator area of the switch need be cut off: Easily done with a Dremel.
One time I was at a train show and I met Steve Ross as I was looking over his products. I told him I was an 027 guy and his reaction surprised and pleased me. He said good for you, and when I questioned why he went on to say that me buying 027 products was helping to keep other train companies going, which keeps them profitable, which then allows the production of more scale proportioned products, of which then he benefits from those sales as those folks tend to want more realistic, prototypical looking track. Great attitude Steve.
I don't know why, but some people have continual problems with a product, that no one else is having. I can say that with the authority of experience. There are those who always malign starter types of products (can motors, nylon gears) yet in almost 30 years, everything is still working and I have never once had a DOA or something that needed service out of the box.
And same goes for my experience with 027 track. But everyone has their preference, which shouldn't be a bad thing. So Rafi, continue to do your homework (as you are here) seeing what others like. Look over layout videos on YouTube. Also consider your layout space, your overall train budget, and the types of trains you wish to run. All those considerations will help point you in the direction that is right for you.