About two months after JSR 363 had gone Final its predecessor JSR 275 exceeded the 100-thousandth download within a period of less than 12 months:
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We hope, over time some of those users will migrate to JSR 363 where can get support for an official standard. A very large number of those 100k plus downloads seems related to GeoAPI and various products or projects implementing and extending it. An upcoming version of GeoAPI should migrate to JSR 363, so where those downstream projects started using new versions, we shall sooner or later see those numbers shift towards JSR 363.