All questions that include the phrase "is it worth it?" are subjective, and only you can answer that.
You need to ask yourself one question:
How important is it TO YOU to be able to access the internet when and where you want to?
If you really don't care if you're offline for long stretches (maybe a few hours, maybe a few days, depending on the circumstances of your trip) that's one thing. If you really want to (or need to) get online access predictably and or reliably, that's quite different.
If all you care about is posting a quick message to social media or checking email briefly once in a while, only when it works out, then don't worry, you will be able to find some wifi somewhere that will probably work OK. If you'll be staying at major chain hotels used by business travelers, you'll have a much better chance of getting good wifi there than at small hotels and B&Bs. Hotel wifi/free wifi is nice when it's available/fast/working, but sometimes it's not any of those things.
If you really want (or need) to access internet reliably on a regular basis, then you may be disappointed (or worse) if you're planning to just catch a free wifi connection in your hotel or other free places (in a cafe, etc.). If you really need to rely on connectivity you would be foolish, IME, to expect free wifi to meet your needs.
Both are perfectly valid, but which way you go depends on what you want/need. For some, being offline for a week is blissful. For others, it's like trying to kick heroin.