In the fast-changing world, keep the website up-to-date is a requirement
To compete with the new trend, Improve website design, speed, ease of use, to stay up to date with technological updates, You may need to change the theme of your WordPress design. Big Companies like Google, FB, and amazon changes UI from time to time. (They don't use WP BTW)
Even though WordPress offers easy to change the theme by a few clicks, It's rare that your website adopted a new theme and worked fine. You always need to make changes and adjustments in theme as well as contents. With my 5 years of experience in WP Development, I know WP from inside-out. thus, I can change themes, Plugins, or even create a plugin that confirms your requirements.
Here is what I can do: