Here is my oldest Japanese maple, planted in 2009.
Acer palmatum 'Sumi Nagashi', Common Name: Red Leaf Japanese Maple, Size: 15x15ft., Red leaf, reddish flowers, USDA Hardiness Zone 5.
Japanese Maple. Best w/part sun, morning sun. East of house on fenceline. Good view from house. Clearly, not a fast grower. Trimmed 2012. Vase-shaped when young, but gradually broadens with age. Grows 8-10' tall over the first ten years, maturing to 10-15' tall and wide. Branches may weep at the ends. Palmate leaves to 4in. long are deeply cut into seven (sometimes 9) elongate-ovate lobes with toothed margins & pointed tips. Foliage purple red in spring, deep maroon in summer and bright red in fall. Small reddish flowers in spring are somewhat attractive close up, but not from a distance. 8x6 ft, 2014. About 10x10 ft in 2018.
Here's a 2009 photo
And a 2018 photo