The majority of websites do not include syntax that limits or dictates how fast their visitors can scroll up or down their pages. When asked about how they would feel about websites that deliberately affect, drive, or regulate their own scrolling speeds, the vast majority of Internet users typically react with staunch opposition to the notion. It can be said that the Internet became a ubiquitous fixture in modern society because it affords anyone searching for content incredible amounts of freedom and convenience in doing so. It is therefore standard for websites to allow their users to scroll up and down the contents of any of their pages with both ease and control.
In general, no one appreciates a website that has standard content but imposes an arbitrary restriction on how fast they are allowed to scroll down the page to see the later portions of it. However, there are many situations in which a website can be designed around a tactically incorporated scrolling setup that makes users at least somewhat understanding of why the scrolling speed change was included. In one hypothetical example, a website that exists to showcase artistic aesthetics and effects that dynamically react to the page being scrolled may give the best impression if its scrolling speed is uniformly paced, and this pacing may be important to the unique experience the website is trying to present.
Opinions are split more evenly over the question of whether or not clicking an anchor link that brings the user to a later segment of a long page should bring the user's view to that segment via a scrolling transition. Some believe that a website that forces a scrolling effect in this scenario would be imposing an unnecessary factor on the user's experience since users can already scroll manually if they wish. Others feel that this scrolling effect helps visually convey to the user how far down a page's content the desired section lies; without the effect, an instantaneous transition to a part of the page can make users feel like they have been brought there "blindly." For more information click here https://www.reddit.com/r/web_design/comments/8uljfb/websites_with_custom_scroll_speeds_are_like/.