We had a really tough time scraping dynamic web content using scrapy, and both scrapy and selenium require you to write a program (and maintain it) for every separate website that you have to scrape. If the website's structure changes you need to debug your scraper. Not fun if you need to manage more than 5 scrapers.

It was so hard that we made our own company JUST to scrape stuff easily without requiring programming. Take a look at https://www.parsehub.com