When the vinyl resurgence started and new vinyl was being pressed, results were not as good as original pressings. There was a learning curve and growing pains for the techs in the new pressing plants, but now new vinyl is worth buying. However, IMO, quality is inconsistent depending on record label and pressing plants. Forum members have reported the most common defect is warping. IMO again, quality control is poor, facilities have a backlog of orders and are trying to keep up.
One thing about new vinyl is that in most cases a remaster or reissue comes from a digital master. There has been an ongoing process by record labels to transfer analogue recordings to digital files. It makes for easier and safer storage and faster turnaround time to press an album. So, your favorite albums may have greater dynamics and no tape hiss, but may run the risk of too much compression compared to the original pressing.
Don’t get me wrong, there are excellent quality records being produced, usually they come from the specialty outlets like MOFI or Acoustic Sounds. Many of the bands and their producers have become more involved in the reissue process to produce a quality product. If you have a choice between new vinyl or a NM used original, often the original will have that magic sound you grew up with.