I'll update this if I find more. For now, this seems to be a partial solution. It's a Gmail add on (except I don't use Gmail) that adds reminders. The options when setting reminders include cancelling it if someone replies, and to remind everyone in the thread. If you combine those two, it seems like — if you use Gmail's web client and have $23/month you're dying to get rid of — a decent way to add the feature. Source: over 1 year ago

I usually use http://tunemymusic.com. Source: 12 months ago

I have not tried playlisty, so I cannot tell you. However, I’ve used tune my music and it’s pretty simple. When you go to the Website, you select what service you're coming from, and the next screen is the destination service. And then you just select songs/playlists that you’d like to transfer and watch it go. It’s pretty straightforward, and if you have any questions, I’d be happy to help you do it as I’ve used... Source: about 1 year ago

You just copy and paste that output - the artist - song name, and save it into a plain text file. You can use services like tunemymusic.com and it will import that text file and create an actual music playlist in spotify, or in a bunch of other music services, so you don't have to go searching. I've already dumped a CSV file of your playlist :-). Source: about 1 year ago

Two that I've used in the past is soundiiz.com & tunemymusic.com. Source: about 1 year ago

I m using tunemymusic.com to transfer, it only allows me to transfer 500 songs a time unless I pay for the premium. Source: about 1 year ago